Traffic Signal Change & Clearance Intervals - PDF
Traffic Signal Change & Clearance Intervals - PDF
Guidelines for Determining Traffic Signal Change and Clearance Intervals - PDF Version  

This is 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.

PLEASE NOTE How This Product is Delivered:  You will receive an email from ITE DRM Fulfillment ( that will contain a link to the PDF and instructions on how to access it. This product will be delivered as a digitally rights managed product, so you will need to follow the instructions to download the appropriate reader and the pdf is intended for single user access. You will not be able to save it to a company server or a public drive.

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