Harel Leon Yocum v. Kansas City Public

In Kansas City, on September 23, 1957, at 5:30 p.m., plaintiff, while operating a motor truck northward on Grand Avenue, undertook
to make a right turn into a private driveway, during the course of which the truck was struck from the rear by defendant's
northbound motorbus. Plaintiff was injured and brought this action against defendant in which he sought damages in the sum
of $35,000. Trial to a jury resulted in a verdict and judgment in favor of defendant, from which judgment plaintiff has appealed.
The sole ground of error assigned is the admission into evidence, over objection of plaintiff, of the opinion of a duly qualified
expert, predicated upon certain hypothesized facts shown in evidence, that the collision could not have occurred in the manner
asserted by plaintiff. A brief statement of the essential portions of the evidence is necessary. Grand Avenue, extending in a general north-south direction, is 62 feet in width along the portion thereof at which the collision
occurred, affording sufficient width for three lanes of traffic in each direction. However, motor vehicles are permitted to
be and sometimes are parked along each of the curb lanes. The private driveway involved is at or near 2505 Grand. It is 23
feet in width and extends eastward to a loading dock located 75 feet east of Grand.