Technical Resources

Guidelines for Determining Traffic Signal Change and Clearance Intervals

An ITE Recommended Practice 

ITE has published guidance on yellow change and red clearance intervals for signalized intersections. The goal of this guidance is to create a consensus methodology for calculating and evaluating traffic signal change intervals that can be consistently implemented by transportation agencies. The recommendations presented should yield reasonable times for the yellow change and red clearance intervals for traffic signals, assisting transportation professionals in  enhancing intersection safety, maintaining reasonable traffic flow, and providing for movement of vehicles, bicycles, and pedestrians.

Purchase Information (click on URL of your preferred format)

Electronic Format

  • Member: $75
  • Non-Member: $150

Print Format - price of electronic format plus $20 shipping and handling

Additional Information:

Press Release 

FAQs 

ITE Journal (March 2020) articles:

Unpublished material cited in the recommended practice:

Webinar: Introducing ITE's Guidelines for Determining Traffic Signal Change and Clearance Intervals, March 19