This case study shows an intersection with offset approaches. The traffic signal operates on one controller, providing a split-phase scheme that prevents the minor street movements from being served simultaneously. The Highway Capacity Manual (HCM) does not have a methodology for addressing the specifics of two signals with one controller. The approach described below was suggested to model this configuration on the Highway Capacity Software (HCS) Streets Model.
I. Streets file with two intersections
- In the Geometry section, the lane configuration was set to represent a corridor with two alternate T-intersections and one short segment between the two.
- The corridor control was configured as coordinated. The cycle length must be equal for both intersections.
II. Timing and Coordination