Which year model of vehicles requires a minimum of 2 stop lamps?

Vehicles manufactured in 1960 and newer are required to have a minimum of two stop lamps. This regulation was established to enhance safety on the road by ensuring that drivers behind a vehicle have clear visual signals when that vehicle is slowing or stopping. The introduction of this requirement corresponds with advances in vehicle design and safety standards that occurred during the 1960s, which aimed to reduce accidents and improve the functionality of vehicle lighting systems.

In contrast, earlier vehicle models, such as those from 1950 and older, were generally designed with fewer safety features and may only have had one stop lamp or different lighting configurations. As vehicle technology progressed, safety regulations became more stringent, necessitating additional stop lamps for increased visibility. This mandatory feature became part of the evolving safety standards in the automotive industry starting from the 1960 model year.