A vehicle assembled before which year must have at least one tail lamp?

The requirement for vehicles to have at least one tail lamp became standardized in the United States with regulations that were implemented over time. The year 1960 is significant because this is when many safety standards began to be enforced more strictly, including those related to lighting and visibility.

Having at least one tail lamp is crucial for vehicle safety, as it ensures that vehicles are visible to others, especially in low-light conditions. By 1960, this regulation was established to enhance vehicle safety and prevent accidents.

Prior to 1960, while some vehicles may have included tail lamps, it was not yet a universally mandated requirement, leading to the conclusion that vehicles manufactured before this year may not consistently possess this safety feature. Therefore, the correct choice indicates the year from which the requirement was expected to be standard across vehicles, ensuring compliance with safety regulations.