On August 8, 1996, the NHTSA published a last rule requiring that truck tractors manufactured on or after July 1, 1997, be outfitted with crimson-and-white retroreflective material much like that required on the rear of the trailers they tow to extend nighttime conspicuity. Manufacturers could choose either retroreflective sheeting or reflex reflectors. In the case of truck tractors delivered with a brief...