Vehicles manufactured after which year must have two stoplights on the rear?

The requirement for vehicles to have two stoplights on the rear began in the United States with the introduction of federal regulations in the late 1950s. Specifically, in 1959, the National Highway Safety Bureau mandated that all vehicles manufactured after this year must be equipped with dual stop lamps. This regulation was aimed at improving safety by providing more visible warnings to drivers behind a vehicle when it is slowing down or stopping.

The focus on 1959 as the pivotal year is due to the federal safety standards coming into effect, making it the benchmark year for the requirement of two stoplights. Later years, such as 1960, continued to uphold this regulation, but the law establishing this requirement was set in 1959. This historical context is essential for understanding why this choice is the correct answer. Vehicles manufactured before this year were not required to have two stoplights, which is why the earlier options do not meet the criteria specified in the question.