Since which year have seatbelts been mandatory in US manufactured trucks?

Seatbelts became mandatory in all US-manufactured trucks starting in 1989. This regulation was part of the National Highway Traffic Safety Administration's efforts to enhance vehicle safety and reduce the number of fatalities and injuries resulting from traffic accidents. By requiring the installation of seatbelts in trucks, the law aimed to protect drivers and passengers in the event of a collision.

The timeline reflects the broader movement toward vehicle safety regulations during that era, following earlier mandates for passenger vehicles. Understanding the year when these regulations took effect can be critical for individuals in the field of vehicle safety, transportation policy, and emergency response, as it highlights the evolution of safety measures in motor vehicles.