How Vehicular Delay is Affected at Signalized Intersections with Light Rail Transit

This paper presents the results of research on how vehicular delay is affected at signalized intersections with light rail transit. This paper discusses both active and passive transit signal priority, which uses different methods to provide light rail transit with an unobstructed path through an intersection. This, while reducing delay for the light rail transit, causes delays for other roadway vehicles using the same intersection. Future intersection designs can balance the two out while getting the most out of the intersection by identifying the factors that affect vehicular delay at intersections with light rail transit. A literature review found that light rail transit frequency, traffic volume, and transit signal priority were the main factors that affect control delay at intersections with light rail transit. It was also found that other factors also affect delay but to a lesser extent. However, it was found that intersections with left-turning light rail transit with limited geometry that shares space with vehicular traffic were not directly addressed. To address this knowledge gap, simulations were conducted on an intersection that fits these parameters. With this model intersection, three alternatives were developed, simulated, and compared to existing intersection vehicular delays. With these comparisons, a recommendation was made. However, this recommendation was not to change the current intersection but to be used in future construction projects.