Decision-Making Guide for Traffic Signal Phasing (2020) / Chapter Skim
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12 3 Traffic Signal Phasing Selection Process 3.1 Traffic Signal Phasing Selection Steps This section of the Guide is intended to outline the steps in the traffic signal phasing selection process. Additional details on each step are provided in subsequent chapters.
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13 Step 2: Understand the Context The operating context of a traffic signal extends beyond the physical location of the intersection and includes additional considerations such as user and movement priorities, state and local agency goals, and corridor context. User and Movement Priorities Users of the intersection include drivers of vehicles, including trucks and transit vehicles, pedestrians, and bicyclists.
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14 b. Safety The traffic signal phase selection process relies heavily on crash data, which is defined differently for existing and new intersections, as discussed below.
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15 For existing intersections, the traffic volume data may be obtained from existing data sources (e.g., spreadsheets or geographic information system (GIS) data maintained by a state or local agency)
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16 Step 6: Document Evaluation and Decisions Decisions and reasoning about signal phasing should be recorded and maintained for future reference. All existing intersection data and conditions should be documented and kept as well.
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