What factors affect the performance of coordinated traffic signals?
Anything that changes the assumed average speed between the signalized intersections will affect the performance of the system. These factors include, but are not limited to: on-street parking, roadway lane widths, number of trucks and heavy vehicles, number of access points, and slower moving vehicles (including non-motorized). Since the analyses tools are not capable of accounting for all of these factors, travel time studies are conducted to confirm the average speed, and the analysis tools are modified to adjust to those speeds as measured in the field. While coordination can be of benefit to some roadway corridors, there is also a detriment. The side streets will receive more red time as the major roadway receives timing preference. The effect to each motorist will be different based on origin and destination.
