The device used for controlling, warning or guiding the traffic is known as traffic signals.
Traffic signals may be either in the form of a power-operated traffic control device or simply a sign.
Types of traffic signals
- Traffic control signals
- Pedestrian signals
- Special traffic signals
The signals which direct the traffic to stop and then permit the same to proceed with confidence through their indications are called traffic control signals. Their signals have three coloured light glows [red, yellow, and green] facing each direction of traffic flow. They are generally operated by electric supply. The red light indicates to the are of the intersection and a green light indicates to the traffic to go. There are traffic control signals which are also provided with additional green lights for turning.