Traffic Light

Traffic lights or crossing lights consist of three led indicators and act as signalling devices at pedestrian crossings, road intersections, and other locations to control traffic flow. Traffic light controls traffic with different colors which indicates what an observer should do at different times. The traffic signal device is built to be durable and adverse to harsh weather and environmental conditions.

What is The Purpose of a Traffic Light?

Road traffic signal lights are designed to ensure orderly control and flow of traffic. It provides a system for pedestrians and vehicles to move safely. Traffic lights also reduce the number of conflict occurrences between vehicles coming from different corners. Overall, they prevent traffic congestion before it occurs and reduces conflict through rationed controls.

Traffic lights can also be used for signals in other areas like railroads, waterways and more.

What are the 3 Traffic Lights?

Traffic light signs consist of red traffic lights, amber or yellow traffic lights, and green traffic lights arranged as vertical or horizontal traffic lights in that other. This is according to international standards, although other variations exist across different jurisdictions.

These lights transmit specific information to drivers and pedestrians through symbols, and colors, eliminating the need for traffic wardens to manually control traffic. When the signal turns red you must stop, when it turns yellow, you’re to slow down and wait, while you can go when it turns green.

How do Traffic Lights Know a Car is Close by?

Modern traffic lights contain active infrared sensors which emit a low level of infrared energy into a specific distance around them. Essentially, when that energy is interfered with by the presence of a vehicle, the sensor sends a corresponding electric signal to the device to change the traffic light. This is how a yellow traffic signal can switch over to a red stop light in split seconds.