Why Is Right Turn on Red Data Important

Major intersection modelling software such as Synchro contain a Right-Turn-On-Red Flow Rate input that historically used a default (approximately 0 vehicles per hour). However, the HCM encourages users to input the actual RTOR Flow Rate based on field observation of the right turn movement. In doing so, analysis is said to produce a more accurate estimate of delay incurred by intersection movements, especially where RTOR volumes are high. We can now provide accurate RTOR traffic data using video from the Scout Video Collection Units in addition to our TMCs.