Regional operations : one approach to improve traffic signal timing.
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Regional operations : one approach to improve traffic signal timing.

Filetype[PDF-111.74 KB]


  • English
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    • Creators:
      Balke, Kevin
    • Corporate Contributors:
      Texas A&M Transportation Institute
    • Subject/TRT Terms:
    • Resource Type:
      Tech Report
    • Geographical Coverage:
    • Corporate Publisher:
      Texas A&M Transportation Institute
    • Abstract:
      In the 2014 Texas Transportation Poll, survey participants identified more effective traffic signal timing as the highest-rated strategy for resolving regional transportation issues (1). One way traffic engineers optimize traffic signal performance is through coordination. Traffic signal coordination involves timing the traffic signals so traffic can travel along a street without stopping at every light. This strategy involves adjusting the starting points of green lights so that when a group of vehicles arrives, it can traverse through the signals without stopping. Providing a good progression depends on a number of factors (many of which are out of the control of the traffic engineer), including: • Vehicle and pedestrian traffic demands. • The distance between intersections. • The need to provide cross-street progression (like in a grid network). The issue comes when a street crosses over into another jurisdiction. Often, these agencies will not or cannot coordinate their signal operations across agency boundaries for a number of reasons, including: • Incompatible equipment/computer systems. • Lack of communication links between signals (2). • Maintenance requirements. • Different operating philosophies. • Institutional barriers, such as interagency agreements. Solving these problems can be expensive and can often require a larger, more regional view than most communities have the resources to take. Because of these issues, agencies are exploring regional traffic signal operations programs (RTSOPs). RTSOPs involve state, county, and city departments of transportation working collaboratively and cooperatively to address a region’s mobility issues on the arterial street networks (3). RTSOPs have many different forms, depending on the goals and objectives of the region and the lead agencies in the region. Often, the central focus of these programs is to provide and improve the coordinated traffic signal operations on arterial roadways that cross jurisdictional boundaries. RTSOPs are also a cost-effective strategy for improving regional traffic signal operations.
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