Since which year model have turn signal lamps become a requirement on vehicles?

Turn signal lamps have been a requirement on vehicles since the model year 1960. This regulation was established in response to the increasing number of vehicles on the road and the need for standardized signaling to improve safety and communication between drivers. The implementation of turn signals allowed drivers to indicate their intentions clearly while changing lanes or making turns, significantly contributing to road safety.

Models produced prior to 1960 may not have been equipped with factory-installed turn signals, leading to a variety of signaling methods that were less effective. The 1960 requirement marked an important step in vehicle design and safety standards, ensuring that vehicles could be operated on the road with a consistent and understood method of communication regarding directional changes.