What factors influence the volume of vehicles turning right on a red indication and why is this important? What does the Highway Capacity Manual recommend if field data on rights turns on red cannot be collected?

Question

What will be an ideal response?

Answer 1

Many factors influence the RTOR flow rate, which makes it difficult to predict. These include whether right turns are on shared or exclusive lane, the right turn flow rate, v/c ratio for conflicting movements, volume of conflicting pedestrians, etc. The HCM suggests that actual data should be obtained in the field for this traffic element. The HCM also recommends the conservative approach of using a value of 0 veh/h when field data are not available, or when future conditions are being considered. This is important because the delay incurred by right-turning traffic is affected by its ability to turn on red.