Performance-Based Management of Traffic Signals (2020) / Chapter Skim
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CHAPTER FOCUS Integrating signal performance measures into the management of a traffic signal system can follow a process that is similar to the outcome-based process introduced in NCHRP Report 812: Signal Timing Manual (STM2) (Urbanik et al.
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2.1 DEFINE THE OPERATING ENVIRONMENT The STM2 includes a comprehensive discussion of signal system operating environments (Urbanik et al.
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Policies and visions. Many transportation agencies have goals related to mobility, reliability, and safety, and performance measures can support the resulting policies and visions driven by those goals.
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Rail (heavy, light, or streetcars using exclusive right-of-way)
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2.5 SELECT SIGNAL PERFORMANCE MEASURES Practitioners can use performance measures at different levels of aggregation. Agencies should consider not only the individual performance measures they will assess, but also how they can combine those measures to provide information about their entire signal system.
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2.6 DETERMINE IMPLEMENTATION SCALE Once an agency has selected signal performance measures, they must decide the best approach to acquire required resources, install upgrades, and integrate signal performance measures into the management of their signal system. Agencies have taken different approaches to implementing signal performance measures, as summarized in EXHIBIT 2-4.
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While some agencies have completed system-wide updates, most build out their systems through smaller projects, either by upgrading all required equipment at a select number of intersections to get to a fully functional pilot project or by upgrading equipment systematically in preparation for future use of performance measures. At first glance it may seem that signal performance measures require significant equipment upgrades (explained in detail in Chapter 4)
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2.7.2 HIGH-RESOLUTION DATA ENUMERATIONS The Indiana Department of Transportation (INDOT) sponsored research into signal performance measures for several years.
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2.7.5 AASHTO INNOVATION INITIATIVE AASHTO selected ATSPMs as a focus technology for the Innovation Initiative in 2013. ITE produced and delivered a series of webinars in 2014; further information is available on the AASHTO website.
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10. Urbanik, T., et al.
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