The Every Day Counts (EDC) innovation of the month for April is automated traffic signal performance measures (ATSPMs), a suite of performance measures and data collection and analysis tools used to modernize traffic signal management.

More than 330,000 traffic signals operate in the United States. Typically, highway agencies retime signals on a 3- to 5-year cycle at a cost of about $4,500 per intersection. For most signals, citizen complaints are the main performance measure. The need to manually collect data to support the use of software to simulate performance drives up retiming costs.

ATSPMs provide high-resolution data to support objectives and performance-based approaches to managing the maintenance and operation activities of traffic signal programs, enabling agencies to boost safety and efficiency while cutting congestion and cost. View an EDC-4 webinar on ATSPMs. Register for a webinar on “Using Performance Measures to Justify Signal Systems on Arterials” from 10:30 a.m. to 12 noon ET on May 4.

Contact Eddie Curtis or Rick Denney of the FHWA Resource Center for information and technical assistance.


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