Question

what are the traffic signals?​

Answer 1

Answer:

Traffic lights, traffic signals, stoplights or robots are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic. The world's first traffic light was a manually operated gas-lit signal installed in London in December 1868.

Answer 2

Explanation:

In most English-speaking countries, traffic lightsusually change in this order: Red light on: This tells drivers to stop. Green light on: This meansthe driver can start driving or keep driving. Yellowlight on: This tells drivers to stop when it is safe to, because the light is about to turn red.