Traffic signal preemption for emergency vehicles :
a cross-cutting study : putting the "first" in "first response."
Washington, D.C. : U.S. Department of Transportation, Federal Highway Administration, ITS Joint Program Office, 
Emergency vehicles /
Roads > Roads / United States > Roads / United States / Interchanges and intersections.
Traffic signs and signals > Traffic signs and signals / United States.
Electronic traffic controls > Electronic traffic controls / United States.
Prepared by the Federal Highway Administration, ITS Joint Program Office and the National Highway Traffic Safety Administration, Emergency Medical Services Division.
Also available online in HTML and PDF formats from the Web site of the ITS Joint Program Office (www.itsdocs.fhwa.dot.gov).
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