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The Traffic Signal Priority (TSP) tool adjusts the timing and phasing of traffic lights when transit vehicles are delayed or arrive prematurely. Transit Signal Priority applications help improve reliability and travel times, road times with long signal cycles, and distances between signals. In urban areas, the benefits of TSP are significantly increased when deployed in parallel with other strategies such as transit-only lanes. The most common tools are described in more detail on the opposite page. Planned measures: Stopping for a few seconds at green lights when traffic vehicles are approaching Red light restrictions for traffic vehicles waiting at the light Adjusting the green phase of traffic lights to coincide with the arrival of traffic vehicles
Further measures: Stopping traffic at red lights to make it easier for buses getting off at stops and stations to get back on track. Coordinating with specific bus-only signal phases to allow emergency vehicles and buses to avoid traffic stopped at red lights.
Traffic light priority strategy: Traffic routes experiencing unexpected travel time delays are prioritized. Waiting at traffic lights is also a major cause of traffic delays. High traffic volume situations are therefore taken into account.
Another contributing factor is the long distance between signals and long signal periods. Effectively use passive traffic light priority due to short block lengths and high passing frequency. They are ideal for downtime environments.
Focus on corridors served by Bus Rapid Transit. Because TSP systems disrupt the standard signal cycles of traffic lights, authorities must decide how often and under what conditions the TSP system will be used. This can allow public transportation to run faster and more on time, but it can also cause delays to other traffic. Traffic lights often require several cycles to return to the standard schedule. If TSP is activated too often or for too short a sequence, it can cause delays to other traffic. It also prevents the signal cycle from reverting to the default schedule. This strategy improves public transport travel times and reliability by reducing vehicle waiting time at red lights.
Some of the requirements related to the plan are: A well-planned system configuration, led by the transport and signal agencies; Well-written guidelines on TSP operation rules; Provide details on equipment and its implementation to ensure compatibility of the system in all jurisdictions; Consider geometric and operational factors such as traffic volume and capacity, signal intervals, and signal cycle length. Contact: Location: STC Co., Ltd. 1201W. Randolph St, McLeansboro, IL 62859 Phone: Richard D’Alessandro: (214) 607–0100 Fax: (214) 607–0105 Email: info@emtracsystems.com Web: www.emtracsystems.com/
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