Triple-ring phase representation scheme for exclusive median bus lane signals

摘要

Current traffic signal operation at intersections on exclusive median bus lane (EMBL) corridors prevents concurrent activation of non-bus through and left-turn phases due to the conflict between left turns and buses, as EMBL lies along the conflict side of a non-bus left-turn lane. This has lowered the performance of traffic signal operation on EMBL corridors. Recognizing the need for exclusive bus signals, this paper proposes a triple-ring phase representation scheme to harmonize the non-bus phases and exclusive bus phases at EMBL intersections. The proposed triple-ring phase representation scheme increases the efficiency of traffic signal operation on EMBL corridors.