What is the GVWR threshold for requiring high-mounted stop lamps on vehicles manufactured on or after 9/1/1993?

The Gross Vehicle Weight Rating (GVWR) threshold for requiring high-mounted stop lamps is an important safety standard established to improve visibility and safety for following drivers. For vehicles manufactured on or after September 1, 1993, the requirement stipulates that vehicles with a GVWR of 10,000 pounds or less must be equipped with high-mounted stop lamps. This design feature enhances the visibility of brake lights, especially when vehicles are stacked closely together or when larger vehicles are present, significantly reducing the risk of rear-end collisions.

The specified threshold of 10,000 pounds is critical, as it distinguishes vehicles that are considered to potentially need this additional safety feature from heavier vehicles that may not have the same operational dynamics. Manufacturers and safety regulators have set these parameters based on testing and research aimed at enhancing road safety for all users. Vehicles above this GVWR generally fall into different classifications that may not require the same design considerations for high-mounted stop lamps.