Traffic Light Signals

Traffic Light Signals

Traffic lights are used to control the flow of traffic. They are also known as traffic lamps, stop lights, stop and go lights and robots. These are designed specifically for use as signalling devices and they are positioned where the road intersects to flows of traffic, be it motor vehicles or human traffic, such as pedestrian crossings, a crossroads or other locations to control the flow of traffic. stop lights

A lot of the cities around the world have these installed to inform the road users by way of lights in standard colours. The colour code is universal and has a precise sequence, and also the colours used are red, amber and green. The precise sequence is very great for people who are colour blind.

The traffic lights which are most commonly in use include a set of three lights, red, amber and green. They are generally set up in a vertical position with the red light at the top, amber light in the centre and the green light at the bottom. In some countries traffic lights could possibly be set up horizontal.

Every time a vehicle approaches some traffic lights along with the light on the signal is red, it is really an indication to that vehicle to avoid. The amber light points too the lights are going to change, either to red in order to green depending on which country you are in. When the lights plunge to green it is signalling that it must be safe to proceed as well as the vehicle may continue its journey.

The variations from the use of traffic lights will vary depending on the country and then any special needs for a certain intersection, for example special lights may used by buses, pedestrians and bicycles etc; or special rules for controlling traffic which are turning in a particular direction. Some intersections can be quite complex and will employ any combination of these.

The first traffic lights were installed away from Houses of Parliament london, Great Britain in 1886 possibly at the time looked like railway signals with semaphore arms and green and red gas lamps.

The modern electric traffic lights was an American invention, and the first interconnected signal system was set up in Salt Lake City in 1917.

The length of time the amber light is illuminated may differ and in many places it can be 5 seconds. In some places it may be as little as 3 seconds which considerably reduces the time the driver needs to react. These times generally vary according to the set speed limit, and longer times receive for higher speed limits.

Lights are used in other types of road signs such as ' Slow Down' signs and fog signs which are illuminated when needed, or in the case of a slow down sign they are often electronically activated as the speeding vehicle approaches.

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