Launching Bus Rapid Transit with Only One Dedicated Lane for Two-Way Bus Traffic on Congested Corridors

Abstract

Bus Rapid Transit (BRT) can be thought of light-rail transit implemented with buses instead of trains. When implemented with dedicated lanes, it achieves highest possible people-throughput potential. However, in most cities in the US and many cities around the world, launching BRT with two dedicated lanes is difficult either because space or budget limitations or because of various possible severities and durations of “the empty-lane syndrome,” which refers to the phenomenon that the dedicated lanes are grossly underutilized and often occurs while the general-purpose lanes are drastically more congested due to the lane conversion. This paper focuses on a busy commute arterial equipped with a left-turn lane at virtually each intersection for each direction. It proposes two intermediate systems, as incremental steps, toward a two-lane BRT system in roadway medians, starting with a one-dedicated-lane BRT system. Both systems are proposed to be safe and efficient BRT systems without further expansion.

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