01371140

Component

https://doi.org/10.3141/2298-01

http://scholar.google.com...ates&publication_year=2012

The lack of a national standard, recommended practice, or set of guidelines for determining the duration of the yellow change and red clearance intervals for the timing of traffic signals has left each transportation agency to determine its own practices. The objective of NCHRP Project 03-95 was to develop a comprehensive and uniform set of recommended guidelines for determining safe and operationally efficient yellow and red intervals at signalized intersections. To accomplish this objective, the study established a state of knowledge and a state of practice through a review of existing guidelines and various literature sources and a survey of transportation agency practitioners. The research also conducted a comprehensive national investigation of driver behavioral characteristics through an extensive field data collection and analysis effort. These efforts confirmed the accepted values for perception–reaction time (1.0 s) and deceleration rate (10 ft/s²) and established 85th percentile speed estimations for through and left-turning vehicles. Justification was also provided for accounting for start-up delay. From the findings, a succinct recommended guideline for the timing of yellow change and red clearance intervals was formulated on the basis of a kinematic equation and its associated variable values. The recommended guideline encourages a uniform practical application that provides a framework that can be easily adopted into transportation agency practice.

01450372

12-3410

English

pp 1–8

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223348

Print

References; Tables

Guidelines; Perception; Reaction time; Red interval (Traffic signal cycle); Signalized intersections; Traffic signal timing; Yellow interval (Traffic signal cycle)

Manual on Uniform Traffic Control Devices

Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2012 5:16PM

• Closed-Course Evaluation of Stop Paddles with Embedded Lights
• Comprehensive Evaluation of Driver Behavior to Establish Parameters for Timing of Yellow Change and Red Clearance Intervals
• Detection, Control, and Warning System for Mitigating Dilemma Zone Problem
• Development of Visual Model for Exploring Relationship Between Nighttime Driving Behavior and Roadway Visibility Features
• Effect of Train Arrival Time on Crash Frequency at Highway–Railroad Grade Crossings: General Classification Regression Model
• Effects of Environmental Lighting Conditions on Operating Speeds on Urban Arterials
• Evaluating Safety at Railway Level Crossings with Microsimulation Modeling
• Evaluation of Comprehension and Legibility of International and Domestic Nonstandard Symbol Signs
• Evaluation of Two Treatments for Reducing Crashes Related to Traffic Signal Change Intervals
• High-Beam Usage on Low-Volume Rural Roads in Texas