§ 25-159. Certain buses and trucks to stop at railroad crossing, when.

Every motor vehicle transporting passengers, for hire, every school bus, every motor vehicle transporting high explosives, or poisonous or compressed inflammable gases, and every motor vehicle used for the transportation of inflammable or corrosive liquids in bulk, whether loaded or empty, shall, upon approaching any railroad grade crossing, be brought to a full stop within fifty (50) feet, but not less than ten (10) feet, from the nearest rail of the railroad, and shall not proceed until due caution has been taken to ascertain that the course is clear; provided, that a full stop shall not be required at a streetcar crossing within a business or residence district, nor at a railroad grade crossing protected by a watchman or traffic officer on duty or by a traffic control "stop and go" signal (not railroad flashing signal) giving positive indication to approaching vehicles to proceed.

State law reference

Similar provisions, RSMo 304.030.