As used in Kan. Stat. Ann. §§ 8-1343 through 8-1347, and amendments thereto, “passenger car” means a motor vehicle, manufactured or assembled after January 1, 1968, or a motor vehicle manufactured or assembled prior to 1968 which was manufactured or assembled with safety belts, with motive power designed for carrying 10 passengers or fewer, including vans, but does not include a motorcycle, a trailer or a vehicle constructed either on a truck chassis registered for a gross weight of more than 12,000 pounds or a farm truck registered for a gross weight of more than 16,000 pounds.