PREFERENTIAL CONTROL WARRANTS OF LIGHT RAIL TRANSIT MOVEMENTS.

The goal of this paper is to demonstrate a method for evaluating a preferential treatment technique for light rail transit (LRT) in urban areas. A mathematical delay model, which uses probability expressions, is presented to evaluate two LRT preemption signal strategies in existing arterial medians. The model permits the user to evaluate three operational options: a two-phase signal plan, a three-phase signal plan with a separate LRT phase, and a three-phase signal plan with an exclusive left-turn phase for main arterial vehicles. The signal controller modeled in this paper has green extension and red truncation capabilities.