SUSAN CONFESSORE VS. AGCO CORPORATION (L-0797-14, MONMOUTH COUNTY AND STATEWIDE) ( 2020 )


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  •                                 NOT FOR PUBLICATION WITHOUT THE
    APPROVAL OF THE APPELLATE DIVISION
    This opinion shall not "constitute precedent or be binding upon any court ." Although it is posted on the
    internet, this opinion is binding only on the parties in the case and its use in other cases is limited. R. 1:36-3.
    SUPERIOR COURT OF NEW JERSEY
    APPELLATE DIVISION
    DOCKET NO. A-0947-18T1
    SUSAN CONFESSORE, as
    ADMINISTRATRIX for the
    ESTATE OF MICHAEL J.
    CONFESSORE, deceased,
    and SUSAN CONFESSORE,
    individually,
    Plaintiffs-Appellants,
    v.
    AGCO CORPORATION,
    Defendant-Respondent,
    and
    WEMROCK ORCHARDS,
    INC., and HIGHTS FARM
    EQUIPMENT COMPANY,
    Defendants.
    ________________________
    Argued October 5, 2020 – Decided November 16, 2020
    Before Judges Sabatino, Currier and DeAlmeida.
    On appeal from the Superior Court of New Jersey, Law
    Division, Monmouth County, Docket No. L-0797-14.
    Peter Chamas argued the cause for appellant (Gill &
    Chamas, LLC, attorneys; Jeffrey Zajac, Peter Chamas
    and William A. Bock, on the briefs).
    Jacob Lehman argued the cause for respondent
    (German, Gallagher & Murtagh, attorneys; Jacob
    Lehman, on the brief).
    PER CURIAM
    This appeal arises from a jury’s no-cause verdict in a products liability
    case.
    Plaintiff’s husband was killed in 2013 when a farm tractor he was
    operating at an orchard flipped over while attempting to remove a tree. The
    tractor was manufactured in 1975 by defendant’s business predecessor in
    interest. Plaintiff and her experts claimed the tractor was defectively designed
    because it lacked a rollover protective system (a “ROPS”), which might have
    spared her husband’s life.
    In response, defendant and its experts contended the tractor was built in
    conformity with the industry's state of the art as of time of its sale in 1975. They
    maintained that a ROPS was not installed in 1975 for “low profile” tractors of
    the kind used in orchards, where low hanging branches could interfere with the
    elevated ROPS attachment.        Defendant also argued that a “foldable” (or
    A-0947-18T1
    2
    "collapsible") ROPS, which plaintiff suggested as a design alternative, was not
    feasible in 1975, nor practical.
    On appeal, plaintiff mainly challenges various aspects of the instructions
    provided to the jury on design defect principles. She also contends the verdict
    form was deficient, and that the judge made erroneous and prejudicial
    evidentiary rulings during the trial.
    For the reasons that follow, we affirm.
    I.
    As of the time of this fatal accident in 2013, decedent Michael J.
    Confessore was a nighttime operations manager at AT&T.           He lived with
    plaintiff Susan Confessore and their eighteen-year-old son.
    Plaintiff and her husband were long-time friends of Lisa Giunco and
    Richard Giunco, a sister and brother who owned Wemrock Orchards (formerly
    known as Twin Lakes Orchard) in Freehold. The Giunco family owned the farm,
    a large portion of which was orchards, since around the 1950s.
    Plaintiff worked part time at Wemrock.        Decedent initially helped
    sometimes with school tours and hayrides at the farm. After Hurricane Sandy,
    decedent began to work part-time at Wemrock, removing trees from the orchard
    that had fallen in the storm.
    A-0947-18T1
    3
    The Accident
    Martin Becktel, who was working with decedent during the fatal incident,
    had been at Wemrock for about a year when the accident occurred. Becktel
    explained the tree removal process. Typically, Becktel would cut a tree and then
    hook it to the tractor by wrapping a chain around it. Then decedent would drive
    the tractor, pulling the tree off to the side. According to Becktel, sometimes a
    tree would be really "grown in, so [they] would have to rip it out."
    On the day of the accident, May 17, 2013, decedent and Becktel were
    using the tractor for tree removal at Wemrock's property on Gravel Hill Road in
    Manalapan. While decedent was driving the tractor, a tree he was trying to
    remove would not budge any further. The tractor went up in the air a few times,
    and then flipped over, crushing decedent. It is undisputed he died from injuries
    caused by the accident.
    The tractor decedent was operating was a Massey Ferguson ("MF") 255
    model, which was manufactured in 1975. The tractor was sold to distributor
    Hights Farm Equipment Company ("Hights") and ultimately purchased by
    Wemrock in 1976 for use in the farm's orchards.1 Edward Szczepanik, the owner
    1
    Before trial, plaintiff settled with Hights and voluntarily dismissed her claims
    against Wemrock.
    A-0947-18T1
    4
    of Hights, stated the tractor was "low profile," and was designed for use in
    orchards.2
    Defendant AGCO Corporation purchased MF in 1994 and became its
    successor in interest.     As the successor company, AGCO has assumed the
    manufacturer's liabilities and defenses for the tractors it sold.
    Expert Testimony
    Most of the testimony at trial centered on the parties' experts' differing
    opinions as to whether the tractor had a design defect. 3 We first summarize
    some of the main points the experts agreed upon or did not contest. 4
    The key and undisputed usefulness of a "low profile" tractor is its ability
    to work in areas, like orchards and barns, that have limited overhead space.
    While the opposing experts differed as to whether the tractor in this case should
    be classified as "low profile," they agreed that it was a MF model 255 that had
    certain "low profile" features. In particular, the experts agreed the tractor was
    less than sixty inches tall and had a horizontal exhaust.           At the time, MF
    2
    As we discuss, infra, the parties dispute whether the tractor was "low profile"
    or a "standard" model with custom-made "low profile" features.
    3
    The parties also presented competing experts on economic loss, which are not
    germane to the liability issues on appeal.
    4
    Neither party contests the qualifications of the opposing experts.
    A-0947-18T1
    5
    produced three primary models: the 255, the 265, and the 275. All of those
    models came in either "standard utility," "low profile," or "row crop"
    configurations, depending on the purchaser's intended use.
    The experts recognized that in 1975 the incidence of rollovers was a
    subject of concern in the tractor market. To discourage such accidents, tractors
    typically included warning labels about the dangers of rollovers and the hazards
    of "high hitching" (i.e., failing to attach a load to the tractor's drawbar when
    being pulled).
    Plaintiff's Experts
    Kevin Sevart
    Plaintiff's main liability expert was Kevin Sevart, a mechanical engineer.
    Sevart inspected the tractor involved in this accident and reviewed the witnesses'
    depositions.
    Sevart testified it has been well recognized since the 1930s that
    agricultural tractors sometimes flip over. Sevart noted that both Szczepanik and
    Richard Giunco had specifically stated in their depositions that the tractor's
    intended use was in orchards. Even so, Sevart opined that the tractor was an MF
    255 "standard utility" tractor with a horizontal exhaust and "low profile" features
    and not technically a "low profile" tractor.
    A-0947-18T1
    6
    Sevart noted that the manufacturer had ultimately developed a ROPS for
    the MF 255 tractor. He opined a ROPS not only would have prevented the
    tractor from rolling onto decedent, but that one was technologically and
    economically feasible in 1975.
    According to Sevart, the presence of a ROPS would not have eliminated
    the possibility of a rollover but would have reduced the harm to the operator.
    He maintained that the MF 255 without a ROPS was unreasonably dangerous
    and defective in design. He noted that by 1975, although not required, all United
    States manufacturers of tractors offered some form of optional ROPS that could
    be purchased for a nominal fee.
    Sevart acknowledged that the federal Occupational Safety and Health
    Administration ("OSHA") requirements do not apply to a 1975 tractor. Even
    today, "low profile" tractors are exempt from having a ROPS. Sevart also agreed
    that it was not until 1985 that the American Society of Agricultural Engineering
    Standards required a ROPS on tractors for the first time.
    Additionally, Sevart recognized that MF never sold a ROPS as standard
    equipment, and that a ROPS available in 1975 would have impeded, to some
    extent, the usefulness of a "low profile" tractor. Nonetheless, he asserted that
    MF could have produced a foldable version of a ROPS in 1975.
    A-0947-18T1
    7
    In this regard, Sevart asserted there were at least three safer tractor designs
    available at the time. For instance, as of 1966, manufacturers such as John Deere
    included standard forward-mounted fixed ROPS on tractors used in orchards in
    Europe. He also noted that a company in California had developed a limb-lifter
    ROPS for use in orchards in the early 1970s. Further, companies like Caterpillar
    (an industrial machinery company) had developed a folding system for
    bulldozers, which he referred to as a ROPS, with what Sevart claimed was a
    comparable technology needed for the MF 255.
    Sevart specifically noted the possibility that an appropriate hinge, a key
    component in a folding ROPS, could have been developed at the time.
    Moreover, Sevart pointed out that by the 1990s MF offered its customers the
    opportunity to retrofit a ROPS for older model tractors.
    Scott Batterman
    Scott Batterman was plaintiff's expert in forensic engineering accident
    reconstruction and biomechanics. During his brief trial testimony, Batterman
    opined that the tractor's steering wheel crushed decedent's chest, and the failure
    to have a ROPS was a causal factor in the injury. This opinion on causation was
    not countered by the defense.
    A-0947-18T1
    8
    Defense Experts
    Defendant presented testimony from three experts who opined on design
    defect issues.
    David Murray
    David Murray worked for AGCO as its director of product safety and
    standards. The court qualified him as an expert in agricultural mechanical
    engineering, product safety and design, safety and manufacturing standards, and
    accident investigation.
    Contrary to Sevart, Murray opined that this particular MF 255 tractor was
    designed to be "low profile." He pointed to the tractor's wheels, which were
    smaller than usual, and its total height of less than sixty inches.
    Murray noted that operators of tractors are supposed to be trained in the
    proper use of the equipment, and that OSHA requires yearly updates to that
    training. According to Murray, in order for this accident to have occurred, the
    tractor had to be pulling twice its capability. He explained that decedent had
    been dangerously "high hitching" the tree to the tractor.
    As to the question of the use of foldable ROPS, Murray noted that such
    safety devices developed over time because the devices needed to be able to fold
    down in areas where overhead space was low.
    A-0947-18T1
    9
    Beginning in the 1980s, MF was developing a foldable ROPS for "low
    profile" tractors. After a change in regulations in the late 1980s, in 1993 MF
    began offering a foldable ROPS that could be installed on older models at a
    reduced price.     There was little profit made in producing them because,
    according to Murray, most farmers were not interested in buying the ROPS for
    their older tractors.
    Murray testified that while a hinge for a foldable ROPS may have been
    feasible in 1975, the foldable ROPS itself was not possible at the time because
    it required much more development. In addition, Murray asserted that Sevart's
    suggested alternative ROPS designs developed by other companies were not
    feasible and would not have prevented this injury. He noted that the limb lifter
    model was not a ROPS by its nature. And, the Caterpillar design was also not a
    folding ROPS, but instead a ROPS that could be collapsed to cover the steering
    wheel for transport, but such a feature made the ROPS impractical. Moreover,
    he claimed, in contrast to Sevart, that as of 1969 John Deere only offered a fixed
    ROPS in its parts book, which he doubted was even a ROPS based on its design.
    Clyde Richard
    Clyde Richard was defendant's expert in human factors, mechanical
    engineering, and accident reconstruction.
    A-0947-18T1
    10
    To develop his expert opinions for this case, Richard used an exemplar
    tractor to do experiments with high hitching and low hitching.
    Richard explained that a tractor cannot flip over rearward, if it is hitched
    properly, standing on level ground. According to Richard, the tractor in this
    case was being misused when the accident occurred. He further opined the
    tractor met the standards for a "low profile" model because of its wheels, exhaust
    system, overall height, and fenders.
    Dennis Murphy
    Dennis Murphy was defendant's expert in agricultural safety. Murphy
    agreed with the other defense experts that decedent and Becktel were using an
    improper hitching technique, instead of hitching to the drawbar, which caused
    the tractor to flip. He, too, opined this tractor was "low profile."
    The Verdict
    The trial judge presented an extensive jury charge explaining the legal
    concepts of design defect. As part of that charge the jurors were provided with
    a verdict form. The form contained a series of liability questions, culminating
    with a final question on damages.           The first question, which addressed
    defendant's dispositive state-of-the-art defense, read:
    1. Has the defendant Massey Ferguson, Inc. proven by
    a preponderance of the evidence that at the time the
    A-0947-18T1
    11
    tractor left its possession in 1975 there was no practical
    and technically feasible alternative design that would
    have prevented the plaintiff's injury without
    substantially impairing the reasonably anticipated or
    intended essential functions of the tractor?
    ______ YES          ______ NO          Vote: ______
    This verdict query tracked the recommended model form. See Model Jury
    Charges (Civil), 5.40D-4, "Design Defect – Defenses" (approved Apr. 1999; rev.
    Oct. 2001). The form and the judge's oral instructions told the jurors that if they
    answered this first question in the affirmative, they were to cease their
    deliberations.
    On the second day of deliberations, the jury returned a unanimous 9-0
    verdict, finding on Question #1 that defendant had met its burden of proof on
    the state-of-the-art defense. Plaintiff did not move for a new trial.
    The Issues on Appeal
    This appeal ensued. In her brief, plaintiff argues that: (1) the court erred
    in permitting defendant to present a state-of-the-art defense, and the jury should
    not have been charged on that defense; (2) the verdict form was deficient by not
    including a special factual interrogatory as to whether the tractor used by
    decedent was a "standard" or a "low profile" tractor; (3) the charge confusingly
    referred to principles of both "risk/utility" and "reasonably safer design"; (4) the
    A-0947-18T1
    12
    charge should have included an instruction on "crashworthiness" concepts; (5)
    the court erred in admitting evidence of negligence by decedent, Becktel, and
    their employer Wemrock; (6) evidence of defendant's post-sale actions was
    improperly presented; (7) the court erred in excluding evidence proffered by
    plaintiff of a 1966 forklift patent; and, finally, (8) cumulative error.
    II.
    We first address plaintiff's various arguments that concern AGCO's
    successful state-of-the-art defense, as well as alleged flaws in the jury charge on
    liability.
    A.
    The New Jersey Products Liability Act, N.J.S.A. 2A:58C-1 to -11,
    provides:
    A manufacturer or seller of a product shall be liable in
    a product liability action only if the claimant proves by
    a preponderance of the evidence that the product
    causing the harm was not reasonably fit, suitable or safe
    for its intended purpose because it: a. deviated from the
    design specifications, formulae, or performance
    standards of the manufacturer or from otherwise
    identical units manufactured to the same manufacturing
    specifications or formulae, or b. failed to contain
    adequate warnings or instructions, or c. was designed
    in a defective manner.
    [N.J.S.A. 2A:58C-2 (emphasis added).]
    A-0947-18T1
    13
    The statute establishes in N.J.S.A. 2A:58C-3 an absolute defense to design
    defect liability, based on the "state-of-the-art" at the time the product was sold:
    a. In any product liability action against a manufacturer
    or seller for harm allegedly caused by a product that
    was designed in a defective manner, the manufacturer
    or seller shall not be liable if:
    (1) At the time the product left the control of the
    manufacturer, there was not a practical and technically
    feasible alternative design that would have prevented
    the harm without substantially impairing the reasonably
    anticipated or intended function of the product.
    [N.J.S.A. 2A:58C-3a(1) (emphasis added).]
    As elaborated in the Supreme Court's seminal opinion on the defense,
    Cavanaugh v. Skil Corp., 
    164 N.J. 1
    , 4 (2000), the term "state-of-the-art" refers
    to "the very safest product of that type which [an] industry could define at the
    time of manufacture" or "a product for which [at the time] there was no
    reasonable alternative design."
    A manufacturer that asserts a state-of-the-art defense has the burden to
    prove what was the existing design technology when the product was
    manufactured. 
    Ibid.
     However, a plaintiff must show that such a reasonable
    alternative design was feasible at the time. 
    Ibid.
    As the Court in Cavanaugh explained:
    If a defendant can prove that there was no practical or
    technically feasible alternative design that both would
    A-0947-18T1
    14
    have prevented the harm and would not have
    substantially impaired the function of the product, the
    defendant cannot be held liable for failure to provide an
    alternative design.
    [Id. at 6 (emphasis added; citations omitted) (quoting
    William A. Dreier, The Restatement (Third) of Torts:
    Products Liability and New Jersey Law—Not Quite
    Perfect Together, 
    50 Rutgers L. Rev. 2059
    , 2081-83
    (1998)).]
    The Court added:
    The plaintiff . . . is usually required to show the
    existence of a reasonable alternative design. . . . Thus,
    a showing of feasibility is the plaintiff's responsibility.
    [Ibid.]
    For a manufacturer to prevail on the state-of-the-art defense, there must be an
    absence of "both a practical and technically feasible alternative." Id. at 9-10.
    The state-of-the-art defense is not available if the danger can "feasibly be
    eliminated without impairing the usefulness of the product." N.J.S.A. 2A:58C-
    3a(2).5 It is the plaintiff's burden to prove this exception exists. Roberts v. Rich
    Foods, Inc., 
    139 N.J. 365
    , 379 (1995) (citing N.J.S.A. 2A:58C-3a(2)).
    5
    N.J.S.A. 2A:58C-3a(2) also provides an exception to the state-of-the-art defense,
    not applicable here if the product is workplace equipment.
    A-0947-18T1
    15
    As part of the state-of-the art functionality analysis, the product's inherent
    characteristics are relevant. "[A] feature of a product that is desirable but not
    necessary is not an inherent characteristic: an inherent characteristic must be an
    essential characteristic." 
    Id. at 382
    . However, "[t]he elimination of an essential
    characteristic might not render the product totally useless, but it would
    measurably reduce the product's appropriateness for its central function." Ibid.6
    Plaintiff argues the trial court erred in giving the state-of-the-art jury
    instruction because the tractor was standard utility and should have been sold
    with a fixed ROPS as mandatory, and not optional, equipment. According to
    plaintiff's theory on this point, a fixed ROPS was available as early as 1968 and,
    therefore, the lack of a fixed ROPS on a standard utility tractor was a design
    defect because it rendered this tractor unsafe as a matter of law.
    Defendant does not dispute that it was selling a ROPS as optional
    equipment on its standard tractors as of 1975. Hence, defendant essentially
    conceded that if the tractor in this case was an unmodified standard tractor, the
    state-of-the-art defense could not justify the omission of a ROPS.
    6
    In addition, the existence or absence of a warning is generally not relevant to
    the question of design defect. Saldana v. Michael Weinig, Inc., 
    337 N.J. Super. 35
    , 49 (App. Div. 2001) (citing N.J.S.A. 2A:58C-3). Although there was some
    testimony at trial about labels that at one time may have been affixed to this
    tractor, no failure-to-warn defect was asserted by plaintiff here.
    A-0947-18T1
    16
    Plaintiff's argument in this regard presupposes that the tractor was
    standard utility and not, in any sense, low profile. In fact, this premise was hotly
    contested at trial. All defense experts opined that the tractor was low profile or
    had been modified from standard for use as low profile. They supported this
    assertion by pointing to the tractor's lower height, smaller wheels, its exhaust
    system, and fenders. As we noted already, the defense experts further stated that
    a fixed ROPS would have interfered with the usefulness of a low profile tractor,
    by adding height to the vehicle and preventing its use in environments such as
    chicken coops, barns and orchards. Moreover, fact witnesses Richard Giunco
    and Szczepanik each stated that the tractor was low profile and intended for use
    in orchards.
    Plaintiff points to several places in the record to support her claim that the
    tractor was not actually low profile.        She quotes, for example, Murray's
    testimony that the tractor was a "standard tractor with low profile features,"
    including shell fenders, low exhaust, low profile tires and a height below sixty
    inches. She further highlights a page from an MF brochure stating the MF 255
    and MF 265 models all came "standard," with three-point linkage for mounted
    implements. Plaintiff also notes that Giunco owned other tractors, including an
    MF 245, which was a "low profile model."
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    17
    Having reviewed the record as a whole, we are satisfied there was ample
    evidence from which a jury could have reasonably concluded that the tractor
    was low profile, and, therefore, did not require a fixed ROPS. Among other
    things, Murphy, Murray, and Richards all testified the tractor was low profile
    either because of its wheels, exhaust system, fenders, height below sixty inches
    or a combination thereof.
    Plaintiff does not dispute that at the time the tractor left defendant's
    control in 1975, a low profile tractor did not require a fixed ROPS. Given the
    reasonable factual support showing this was a low profile tractor, defendant
    appropriately asserted the state-of-the-art defense. Hence, the court was correct
    to deliver an instruction on state-of-the-art to the jury.
    In a related point, plaintiff contends the trial court committed reversible
    error by declining to include a specific jury interrogatory on the verdict form,
    requiring them to determine whether (a) the tractor was standard or (b) low
    profile. We disagree.
    Special interrogatories on verdict forms are utilized to prompt the jury "to
    specifically consider the essential issues of the case, to clarify the court's charge
    to the jury, and to clarify the meaning of the verdict and permit error to be
    localized." Sons of Thunders, Inc. v. Borden, Inc., 
    148 N.J. 396
    , 419 (1997)
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    18
    (quoting Wenner v. McEldowney & Co., 
    102 N.J. Super. 13
    , 19 (App. Div.
    1968)). Claimed flaws in verdict interrogatories are generally not grounds for
    reversal unless they are shown to be "misleading, confusing, or ambiguous." Id.
    at 418.
    The trial court is reposed with substantial discretion in deciding whether
    to include a special interrogatory on a verdict form, and, if so, how to phrase it.
    See R. 4:39-2 (providing that the trial court "may submit to the jury, together
    with forms for a general verdict, written interrogatories upon one or more issues
    of fact the decision of which is necessary to a verdict.").
    Here, the trial judge did not abuse her discretion in sustaining defendant's
    objection to plaintiff's requested query on the jury form. Plaintiff's binary
    question, asking whether the tractor was either standard or low profile, ignores
    the nuance and complexity involved in categorizing this particular tractor.
    Several witnesses used qualifying language in describing or classifying
    this tractor. For example, defense expert Murray described the tractor as "a
    standard tractor" with "low profile features." Another defense expert, Richard,
    described the tractor as "a standard tractor made low profile," due to
    modifications.
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    19
    The classification of standard versus low profile defied a simple one-or-
    the-other jury inquiry. The jury could have found it impossible to answer such
    a binary question.    No judicial discretion was misapplied in omitting the
    proposed query.
    Plaintiff further argues that even if the tractor was low profile, a foldable
    ROPS was technically feasible and practical in 1975, and it was a design defect
    for defendant not to include some type of ROPS as mandatory equipment.
    Plaintiff contends this negates any reliance by defendant upon a state-of-the-art
    defense. We disagree.
    To assert the state-of-the-art defense, defendant needed to show that at the
    point the tractor left MF's control in 1975, there was no practical or technically
    feasible alternative design that would have prevented decedent's injury. The
    evidence reasonably bore out that, in 1975, the state-of-the-art in the tractor
    industry was such that a foldable ROPS was not practical or technically feasible.
    Data had not yet been accumulated indicating a ROPS was necessary on a low
    profile tractor. Moreover, according to Murray's expert testimony, a folding
    ROPS that would be used sometimes and folded at other times presented
    significant risks that the tractor operator might forget to raise the ROPS after
    leaving the low profile area.
    A-0947-18T1
    20
    Plaintiff argues the court erred in giving the state-of-the-art instruction
    because defendant allegedly challenged only the practicality, and not the
    technical feasibility, of including a folding ROPS in 1975. She spotlights
    several portions of the record to support her claim.
    For example, defense expert Richard testified that a foldable ROPS was
    technically feasible in 1975, but it just had not been done yet. But Richard then
    elaborated, "[w]hat happens in engineering is there's an accumulation of data,
    and there's some accumulation of data . . . then different things pop up. But
    there hadn't been, at that point, I believe, an accumulation of data in the early
    '70s." Richard also testified that a foldable ROPS in 1975 was not feasible
    because it had not been engineered, proof tested, or field tested "to make sure it
    wouldn't create accidents." In essence, Richard's opinion was that the state-of-
    the-art in 1975 was such that the technical data had not yet indicated the need
    for a folding ROPS on a low profile tractor and, therefore, one had not yet been
    designed.
    Plaintiff also points to Murray's testimony that it would have been feasible
    but not practical to design a folding ROPS in 1975. But Murray also testified
    that low profile tractors were a "relatively small part of the market," and "it took
    time to get the statistics" to determine the actual risk of having a low profile
    A-0947-18T1
    21
    tractor where the driver might forget to put the ROPS back up when no longer
    in a low profile situation. When asked whether in 1975 it was feasible to have
    a hinge that connected a ROPS to a low profile tractor, Murray responded,
    "[t]here's a lot more involved than just a hinge."
    Murray did ultimately acknowledge that it would have been feasible in the
    1970s to do the necessary studies, but a foldable ROPS presented other serious
    risks for operators of low profile tractors. He noted that, even currently, OSHA
    regulations specifically state that a foldable ROPS on a low profile tractor is not
    feasible.
    Murray testified that, although the component of a hinge was feasible in
    1975, a foldable ROPS “was not feasible at that time.” Murray explained that
    there was not yet a basis to ensure that such a hinge “was strong enough to meet
    the qualifications of a ROPS at that point in time.”
    Murphy similarly testified that standards for such a device “hadn’t even
    been invented yet.” He further noted that an OSHA Committee considered, and
    apparently agreed with, testimony during the rulemaking process that it was “not
    feasible” to require a ROPS on tractors used in low profile situations.
    A-0947-18T1
    22
    Lastly, Richard testified that a folding ROPS had not been designed or
    "proof tested" for safety and was not “technically feasible and practical back in
    1975.”
    Plaintiff contends that Murray and Richard “admitted” technological
    feasibility by acknowledging the feasibility of a hinge component. However, a
    jury reasonably could have found persuasive Murray’s caveat that it was not yet
    technologically clear in 1975 that such a hinge would have met the strength
    requirements for a foldable ROPS. She also points to testimony Richard gave
    at his pretrial deposition agreeing that a foldable ROPS could have been built in
    1975. But when confronted about that earlier statement on cross-examination at
    trial, Richard explained the reason one had not yet been built as of 1975 was
    because “there were too many unknowns.”
    Despite the attempted impeachment of these two witnesses by plaintiff's
    skillful advocacy, the jury could have reasonably accepted their explanations,
    along with Murphy’s own testimony and the lack of OSHA approval, and
    concluded a foldable ROPS was not yet technologically feasible when this
    tractor was manufactured. The record simply is not as one-sided as plaintiff
    portrays it.
    A-0947-18T1
    23
    Plaintiff cites Barker v. Deere & Co., 
    60 F.3d 158
    , 166-67 (3d Cir. 1995),
    for the proposition that the nonexistence of a safety device is not evidence of its
    non-feasibility.   That case is readily distinguished because it specifically
    analyzed Pennsylvania law, and not whether a jury should be instructed on New
    Jersey's state-of-the-art defense. Also, as we have noted, several experts opined
    that there were risks associated with a foldable ROPS, inasmuch as a tractor
    operator might forget to raise it when leaving a "low profile" area. No data
    existed in the 1970s establishing that the risks of such a foldable ROPS
    outweighed the benefits.
    Viewing the record as a whole, there was substantial evidence presented
    that it was not practical or technically feasible to design the folding ROPS in
    1975, given that the data had not yet indicated the need for it. The jury was
    appropriately asked to resolve whether these proofs supported defendant's
    position. The court was correct to give the state-of-the-art instruction.
    Once defendant asserted the defense, it became plaintiff's burden to
    establish that there was a superior design available that would not impair the
    usefulness of the tractor. It was for the jury to decide whether defendant
    correctly asserted the defense and whether plaintiff met her burden of proof.
    The jury concluded on Question #1 that the defense had been established.
    A-0947-18T1
    24
    When determining on appeal whether jury instructions were erroneous,
    the question is whether the charge was clearly capable of producing an unjust
    result. Domurat v. Ciba Specialty Chems. Corp., 
    353 N.J. Super. 74
    , 93 (App.
    Div. 2002). A reviewing court must consider the instructions as a whole to
    determine whether they adequately conveyed the law and did not mislead or
    confuse the jury. 
    Ibid.
     Instructions given in accordance with the model charge,
    or which closely track the model charge, are generally not considered erroneous.
    Mogull v. CB Commercial Real Estate Grp., Inc., 
    162 N.J. 449
    , 466 (2000).
    To summarize, the trial court did not err in allowing defendant to present
    a state-of-the-art defense at trial, and in so instructing the jury on that defense.
    The court's instructions and verdict form on state-of-the-art closely tracked the
    model jury charge for the state-of-the-art defense. The instructions and verdict
    form were not capable of producing an unjust result or prejudicing substantial
    rights. R. 2:10-2.
    The evidence reasonably supported a jury finding that the tractor was low
    profile, and therefore there was no practical or technically feasible ROPS
    available when the tractor left defendant's control in 1975.
    A-0947-18T1
    25
    B.
    Plaintiff argues the court erred in giving the jury instructions on both "risk
    utility" and "reasonably safer design" concepts. At trial, there was extensive
    discussion between counsel and the judge as to whether the court should give
    the model instructions on both risk utility and reasonably safer design. The court
    agreed that the overlap in the two charges could be confusing, but nevertheless,
    decided to give both charges.
    Specifically, the court instructed the jury that: a defendant must design a
    product that is reasonably safe; a design defect exists if the foreseeable risk of
    harm could have been reduced or avoided by adoption of a reasonably safer
    design; and, that if defendant failed to include a practical and technically
    feasible safer alternative design, the tractor had a design defect . However, if
    plaintiff failed to provide a practical and technically feasible safer design, or if
    the tractor was designed reasonably safe, then there was no design defect.
    Additionally, the court instructed the jury to weigh the "risk utility"
    factors, which are: (1) the usefulness and benefit of the tractor as it was
    designed; (2) safety aspects of the tractor; (3) if there was a substitute design
    that was feasible and practical; (4) the ability of defendant to eliminate the
    unsafe character of the tractor without impairing its usefulness; (5) the ability
    A-0947-18T1
    26
    of a foreseeable user to avoid danger by the exercise of care; and, (6) the
    awareness of the user of dangers because of general public knowledge or the
    existence of warnings or instructions.
    Plaintiff contends the court should have given only the "reasonably safe
    design" jury charge and omitted any "risk utility" charge. In fact, the product
    liability statute and case law in design defect matters meld these two concepts,
    to some extent.
    The delineation of an actionable "design defect" under N.J.S.A. 2A:58C-
    3a(1) includes a consideration of both: (1) whether there existed "a practical and
    technically feasible alternative design that would have prevented the harm" —
    which concerns the availability of reasonably safer alternative designs; and, (2)
    whether that design "would have prevented the harm without substantially
    impairing the reasonably anticipated or intended function of the product" —
    which involves an evaluation of the utility of the product. 
    Ibid.
    The statute entails weighing the risks of not adopting the alternative
    design against the utility of that design change and its impact upon the product's
    functionality. As the Supreme Court has explained:
    The decision whether a product is defective because it
    is "not reasonably fit, suitable and safe" for its intended
    purposes reflects a policy judgment under a risk-utility
    analysis. . . . That analysis seeks to determine whether
    A-0947-18T1
    27
    a particular product creates a risk of harm that
    outweighs its usefulness. . . . Risk-utility analysis is
    especially appropriate when a product may function
    satisfactorily under one set of circumstances and yet,
    because of a possible design defect, present an
    unreasonable risk of injury to the user in other
    situations. . . .
    [Jurado v. W. Gear Works, 
    131 N.J. 375
    , 385-86 (1993)
    (emphasis added) (citations omitted).]
    We recognize the Notes to the Model Jury Charges advise that in a design
    defect case, generally the court should provide the jury with either the charge
    on "reasonably safe design" or "risk utility," but not both. See Model Jury
    Charges (Civil), 5.40D-3, "Design Defect – Legal Tests of Product Defect"
    (approved Apr. 1999). The Notes advise that either charge can be appropriate
    because they essentially focus on the same principles. 
    Ibid.
     However, the Notes
    go on to say the trial court may issue the reasonably safer charge but may also
    "use the additional risk-utility factors only if the case is unusual in that it
    requires one or more of these additional elements." 
    Ibid.
    Although it may have sufficed here for the court to have issued only the
    "reasonably safer" charge and omitted the "risk utility" charge, the overlap or
    redundancy of those charges in this case was not unduly prejudicial. The overlap
    does not provide grounds for setting aside this verdict.
    A-0947-18T1
    28
    The experts on both sides debated whether a foldable ROPS was an
    available "reasonably safer" design that could reduce the risks of rollovers. In
    addition, they also debated whether such a safer device significantly reduced the
    utility of a tractor used in low profile settings because such a device needed to
    be raised and lowered by the operator. Both risk and utility were part-and-parcel
    of the contested issues.
    The additional concepts the court mentioned in the "risk utility"
    instruction were not demonstratively prejudicial to plaintiff. Moreover, any
    alleged prejudice to plaintiff arising out of overlapping charges is conjectural.
    That is because the jury never reached this defect issue, having concluded on
    Question #1 of the verdict form that the state-of-the-art defense foreclosed
    liability, regardless of the comparative risks and benefits of an alternative design
    that the jury found simply did not exist in 1975. In sum, the overlap of the
    instructions was not of consequence here.
    C.
    Plaintiff further criticizes the jury charge for not containing an instruction
    on the concept of "crashworthiness."
    "'Crashworthiness' is defined as the ability of a motor vehicle to protect
    its passengers from enhanced injuries after a collision." Poliseno v. Gen. Motors
    A-0947-18T1
    29
    Corp., 
    328 N.J. Super. 41
    , 51 (App. Div. 2000) (citation omitted). "Strict
    liability is imposed on a manufacturer for injuries sustained in an accident
    involving a design or manufacturing defect that enhanced the injuries, but did
    not cause the accident." 
    Id. at 52
    .
    Here, it is undisputed that a ROPS would not have prevented the rollover
    accident itself.    Rather, plaintiff claims that a ROPS, whether standard or
    foldable, would have lessened the impact upon her husband once the rollover
    occurred.
    We are mindful of the Restatement (Third) of Torts: Products Liability §
    16 (Am. Law Inst. 1998) (Restatement), which explains the concept of
    crashworthiness in a manner that arguably could fit this kind of tractor rollover
    case. Under such a concept, "[t]he plaintiff must . . . establish that the defect
    [in lacking a design that is 'crashworthy'] was a substantial factor in increasing
    the plaintiff's harm beyond, the harm that would have occurred from other
    causes."    Ibid.   Indeed, the Restatement presents a scenario that depicts a
    situation with a tractor rollover accident occurring when a tractor lacked a
    ROPS. Id. at cmt. b, illus. 4.
    Despite these Restatement passages, our Supreme Court has yet to
    prescribe that a jury charge on crashworthiness is appropriate to use in a
    A-0947-18T1
    30
    products liability case that involves a tractor, rather than an automobile or a
    truck. In the absence of such a mandate, the trial judge did not err in denying
    plaintiff's novel request for the charge in this tractor setting.
    Moreover, the detailed charges which the court did issue on design defect
    principles furnished the jurors with helpful guidance in considering the possible
    benefits of having a ROPS installed to prevent the decedent from sustaining
    greater harm in a rollover.
    Lastly, the absence of a crashworthiness charge is inconsequential because
    the jurors found the state-of-the-art defense was applicable and did not reach the
    issue of damages.
    III.
    The remaining arguments posed by plaintiff are likewise unavailing. We
    briefly canvass them here. All of them concern rulings of evidential relevance
    and admissibility, as to which civil judges generally have wide discretion. See,
    e.g., Green v. N.J. Mfrs. Ins. Co., 
    160 N.J. 480
    , 492 (1999).
    First, we are unpersuaded the court abused its discretion in admitting
    certain proofs of negligent conduct on the part of decedent, Becktel, and
    Wemrock. Their conduct was germane to the issues of proximate causation. For
    example, if the jury found the accident could have been avoided if the chain
    A-0947-18T1
    31
    attached to the tree had not been "high-hitched," such a finding would weigh
    against a finding that an alleged design defect in the tractor proximately caused
    the harm. See Fabian v. Minster Mach. Co., Inc., 
    258 N.J. Super. 261
    , 278 (App.
    Div. 1992).
    Next, the court did not abuse its discretion in admitting proof of
    defendant's post-sale actions in marketing a folding ROPS in 1993.          That
    evidence was admissible under N.J.R.E. 401 because it was relevant to defense
    expert Murray's general discussion about the evolution of the ROPS from the
    1960s through the present time. The court also gave a limiting instruction that
    reasonably explained to the jury the limited probative nature of this post-sale
    evidence.
    Plaintiff further argues the court erred in admitting evidence of the OSHA
    standard regarding low profile tractors, because the standard was adopted in
    1976, after the tractor was manufactured. The court ruled that the OSHA
    standard could be discussed in opening and closing statements and the court
    would instruct the jury that opening and closing statements are not evidence .
    The court also ruled the parties could bring out in testimony the fact that OSHA
    standards for ROPS were adopted after 1975. In making these rulings, the court
    did not abuse its discretion.
    A-0947-18T1
    32
    The timing of the evolution of the OSHA standards provided the jurors
    with useful context. Moreover, at least one expert pointed out OSHA has not
    required foldable ROPS to be installed on low profile tractors, even to this day.
    The evidence had sufficient probative value under N.J.R.E. 401 to be presented
    and was not so substantially prejudicial as to require its exclusion under N.J.R.E.
    403.
    Plaintiff further argues the court erred in permitting defendant to introduce
    evidence of the manufacturer's 1993 marketing campaign.                The court's
    instructions clearly asked the jury to determine whether there was a design
    defect according to the state-of-the-art in 1975. Even if every aspect of the post-
    1975 marketing campaign was not entirely relevant, it was appropriate for the
    jury to understand the evolution of the ROPS, as part of its assessment of
    whether there was a reasonable safer design alternative available in 1975.
    As a final claim of evidential error, plaintiff argues the court erred by
    disallowing her to introduce evidence of a 1966 patent for a retractable overhead
    guard for a forklift. The court excluded the forklift patent because it was not
    designed to prevent a tractor rollover. We detect no abuse of discretion under
    N.J.R.E. 403 in the court's exclusion of this attenuated proof concerning a
    different product.
    A-0947-18T1
    33
    Plaintiff's claim of cumulative error and all other points raised on appeal,
    to the extent we have not already addressed them, lack sufficient merit to be
    discussed here. R. 2:11-3(e)(1)(E).
    Affirmed.
    A-0947-18T1
    34