USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
OFFICE OF RESEARCH, DEVELOPMENT, AND TECHNOLOGY AT THE TURNER-FAIRBANK HIGHWAY RESEARCH CENTER

The Dilemma Zone SBIR Success Story

FHWA-HRT-22-084.pdf (413.74 KB)

This document highlights drivers' decisions regarding the dilemma zone (DZ). The DZ phenomenon is described as the moment when drivers face a predicament as a stoplight suddenly turns yellow, requiring either an abrupt stop or a rapid acceleration through the intersection.

Last updated: Monday, August 22, 2022