Traffic Signal Equipment
Site Acceptance Test (SAT)

Traffic Signal Equipment Site Acceptance Test (SAT)

Once the traffic signal equipment has been installed on site it must be tested again. This test is known as the Site Acceptance Test (SAT) and is to ensure that all the wiring has been installed correctly and that all the detection is working as expected.

The first stage of a Site Acceptance Test is to ‘flash out’ the signals. This involves testing each set of lights on each approach to ensure the correct ones illuminate together. Following this the detector inputs in the controller are checked to ensure that vehicles are being picked up as they pass through the junction – if any detection isn't working it could lead to the approach not getting any / enough green time and a long queue building up.

Finally the lights are fully switched on and observations made for a period of time to confirm that everything is working as expected.

A SAT will always take place outside of peak hours (to minimise congestion if there are any problems) and usually only on a Tuesday, Wednesday or Thursday.

Require Traffic Signal Design Services?

Sanderson Associates have enjoyed over 37 years in business, our Traffic Signal Design Team have extensive experience in assisting our Clients with their Traffic Signal Design requirements for a wide variety of major and minor developments throughout the whole of the UK, Isle of Man and Ireland.

We would be pleased to provide you with our competitive fee proposal for our Traffic Signal Design Services, please call us on 01924 844080 or click here to complete our secure online form.

Traffic Signal Equipment, Installed On Site
Tested, Wiring, Detection
Site Acceptance Test, SAT
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