IN TI'IE SUPREME COURT OF THE STATE OF DELAWARE

CHRISTOPHER A. CASE, §
§ No. 134, 2015
Plaintiff Below- §
Appellant, § Court Below: Superior Court
§ of the State of Delaware
v. §
§
AARON R. TAYLOR, § CA No. K13C-12-020
§
Defendant BeIow- §
Appellee. §

Submitted: January 13, 2016
Decided: February 3, 2016

Before HOLLAND, VALII-IURA, and VAUGHN, Justices.
0 R D E R

On this 3'°‘ day of February 2016, it appears to the Court that:

(1) Plaintiff-Below/Appellant Christopher A. Case appeals from a Superi0r
Court ruling which limited the testimony of his expert in this personal injury case.
He contends that the trial court erred by ruling that his expert could not testify that
Defendant-Below/Appellee Aaron R. Taylor was driving his vehicle in an unsafe or
improper marmer. He further contends that the trial court erred by precluding his
expert from establishing Taylor’ s negligence based upon Taylor’s familiarity with the
Delaware Driver’s Manual (the "Manual"). Although his expert did many

calculations, the crux of both contentions is the use of a so-called "three-second rule"

or “four-second rule" found in the Manual. We find no merit to Case’s appeal and

affinn.

(2) On March 4, 20l3, Taylor was driving southbound in the far right lane of
U.S. Route 13 in Dover, Delaware. On this particular stretch of Route 13, there were
three southbound motor vehicle lanes. To the right of the rightrnost motor vehicle
lane was a southbound bike lane. To the right of the bike lane was a right turn lane
that led to a Delaware State University entrance. Ahead of Taylor, there was a
commercial van towing a flatbed trailer. The flatbed trailer contained some plywood,
but both the driver of the van and Taylor testified that the trailer did not affect their
view of the road. Taylor estimated he was traveling thirty miles per hour and about
thirty to forty feet behind the van before entering the right turn lane. The posted
speed limit was forty miles per hour.

(3) At approximately 12:30 p.m., Taylor turned on his right turn signal and
proceeded into the right turn lane. At the same time, Case was riding an adult tricycle
northbound in the southbound bike lane. As Taylor checked his mirrors and entered
the bike lane, which he had to cross to enter the turn lane, Case and Taylor collided.
Case was severely injured. Case was cited for traveling in the wrong direction on a
divided highway in violation of 21 Del. C. § 4l26(a)(7). Taylor did not receive a

citation.

-(4) Case initiated this action against Taylor in December 2013. Before trial,
the trial judge denied a defense motion for summaryjudgment but did find that Case
was negligent per se due to Case’s plea of guilty to the citation. Additionally, the
trial court issued the order complained of on this appeal limiting the testimony of
Case’s expert. Specifically, the trial court ordered that Case’s expert could not testify
that Taylor’s driving was improper or unsafe, and could not testify as to what or what
were "proper or improper, safe or unsafe, speeds or distances"' because "[t]hat [was]
for argument and jury determination based upon facts testified to by observing
witnesses, not an opinion based upon the Driver’s Manual."z The trial court also
ruled that Case’s expert could not use the Manual to establish that Taylor had
committed a driving violation. However, the trial court did allow Case’s expert to
testify regarding his various mathematical calculations about following distances,
speed, and line of sight.

(5) Trial commenced in Februaiy 2015. On cross-examination, Taylor testified
that he was familiar with the Manual.3 When asked about following distances, Taylor
responded that the distance should be reasonable and safe, and that he remembered

the Manual contained a two- and tl1ree-second recommendation. At that point,

' Appellant’s Op. Br. App. at Al04.
2 Id.
3 Taylor also referenced the Manual during his pretrial deposition.

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Taylor’s counsel objected to the use of the Manual, and the objection was sustained.
In sustaining the objection, the trial court noted that the Manual’s recommendations
were not law but merely guidelines for safe driving. At the conclusion of the
evidence and closing arguments, the trial judge instructed the jury that Taylor could
be considered negligent if he violated any one of several motor vehicle statutes,
including following too closely,‘ driving in a careless manner,$ failing to give full
time and attention to the operation of his motor vehicle,° and failing to keep a proper
lookout.’ Thejury retumed a verdict in favor of Taylor after it determined that Case’s
negligence was the sole proximate cause of the accident. This appeal followed.

(6) "We review a trial judge’s decision regarding the admissibility of expert
testimony for abuse ofdiscretion."“ "If the Court determines that a trial judge abused
his or her discretion, the Court will then consider whether the mistakes constituted
significant prejudice so as to have denied the appellant a fair trial."° "[R]elevant[]
evidence may be excluded if its probative value is substantially outweighed by the
danger of unfair prejudice, conliasion of the issues or misleading the jury . . . .”'°
‘*210¢1. C. §4123.

5 21 Del. C. §4l76(a).

° 21 Del. C. §4176(b).

7 Id.

3 Potrer v. Blaclcburn, 850 A.2d 294, 297 (Del. 2004).
9 Id.

m D.R.E. 403.

(7) ln a part called "Sharing Space,"" the Manual discusses a three-second
ruIe. lt states that under the three-second rule, a driver should stay at least three
seconds behind the vehicle in front of him. lt then continues with a four-second rule,
under which the driver should stay four seconds behind when following a vehicle.
lt gives ten situations to which the four-second rule applies. One of the ten is
subtitled, "When following drivers who cannot see you."” lt provides that "[t]he
drivers of trucks, buses, vans or vehicles pulling campers or trailers may not be able
to see [a driver] when [the driver is] directly behind them."” lt also provides that:
"Large vehicles also block your view of the road ahead. Falling back allows you
more room to see ahead and to be seen.""

(8) Case contends that the trial court precluded his expert from testifying that
Taylor was driving in an unsafe or improper marmer because it was an opinion on an
ultimate issue, and opinions on the ultimate issue are permitted under Delaware Rule
of Evidence 704. We fmd, however, that the trial court excluded that portion of the

expert’s testimony because it was based on the three- and four-second rules set forth

in the Manual, and that testimony concerning the Manual should be excluded under

Rule 403.

" Appellant’s Op. Br. App. at A93.
'2 ]d. at 94.

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(9) Thejury was instructed that it could find Taylor negligent if he violated any
one of several Delaware motor vehicle statutes. There was a risk that the jury may
give the three- and four-second rules undue weight and use them as a legal measure
of one or more of the statutes involved, such as following too closely, rather than
focusing on the language of the statutes involved. The three- and four- second rules
are not part of Delaware’s motor vehicle code. They are not administrative
regulations. Nowhere in the record is it established that they are so widely known
that they constitute a standard of care. Moreover, it is not at all clear that they were
intended to address a situation such as the one involved here_ a bicyclist going north
in a southbound bike line of Route 13 in clear violation of a traffic law.'s The trial
court acted within its discretion in concluding that evidence of the three- and four-
second rules from the Manual could create a danger of confusion of the issues or
unfair prejudice to Taylor.

(10) Case’s contention that he should have been pennitted to use the Manual
because Taylor was familiar with it and relied upon it must also be rejected. His

response at trial when asked about following distances in the Manual showed that he

" Case’s expert was permitted to testify regarding the various distances and resulting lines of sight.
He also opined, based on his calculations, that if there was a greater distance between Taylor and the
van in front of him, he would have seen Case in time to perceive and react. With that being said,
Case’s expert did not opine as to whether Taylor would have enough time to stop before colliding
with Case, which rendered his opinion regarding Taylor’s negligence conclusory.

6

did not remember the ManuaI correctly. He also testified during discovery that the
requirement of signaling at least 300 feet before turning was in the Manual, but it is
a codified rule of the road at 21 Del. C. § 4l55(b). Moreover, the three~ and four-
second rules present the same dangers of issue confusion and unfair prejudice to
Taylor whether introduced during the expert’s testimony or 'l`aylor’s cross-
examination.

NOW, TI-IEREFORE, IT IS ORDER.ED that the judgment of the Superior

Court is AFFIRMED.

BY THE COURT:

 

