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Turner-Fairbank Highway Research Center

 
 
 
 
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Safety Evaluation Of Discontinuing Late-Night Flash Operations at Signalized Intersections

Product Type

HSIS Summary Report

Author

Bo Lan, Raghavan Srinivasan

Date

Aug-13

Abstract

During late-night flash (LNF) mode (from late night to early morning hours), traffic signals flash yellow for one road (typically, the major road), requiring caution but no stopping, and flash red for the other road (typically, the minor road), requiring drivers to stop and then proceed through the intersection after yielding to the traffic on the major road. The intent of LNF is to reduce energy consumption and delay during periods of low traffic demand. However, in recent years, many agencies have begun replacing LNF with normal phasing operation because of safety concerns.

Link To HSIS Summary Report

Safety Evaluation Of Discontinuing Late-Night Flash Operations at Signalized Intersections


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