Signal aspects and the intergreen period
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The indication given by a signal is known as the signal aspect. The usual sequence of signal aspects or indications in Great Britain is red, red/amber, green and amber. The amber period is standardised at 3 s and in all new signal installations the red/amber at 2 s.
KeywordsTraffic Signal Signal Aspect Travel Path Highway Traffic Green Period
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- 1.Department of Transport, General principles of control by traffic signals, Advice Note TA/16/81, London (1981)Google Scholar