Knowledge Base

Phase Intergreens are important safety parameters which ensure sufficient clearance times between traffic starting and stopping at a traffic signal junction. They must be determined as part of a junction’s design process usually by considering the junction’s geometry and the paths taken by different traffic movements. In the UK phase intergreens are measured and calculated using the method described in the UK Traffic Signs Manual, Chapter 6. This involves determining[…]

This concept, which is unique to LinSig, requires careful consideration but is easily observed at any existing junction with a right turn indicative green arrow. When right turners are controlled in this way there are no stationary vehicles in front of the stop line at the end of green, which can then clear the junction in the following Intergreen period. However, an equivalent storage effect applies because of the way in which vehicles move off at the start of the arrow phase green period. This[…]