Practice Details
State Agency: Iowa
Practice Provision: Warning lights on channelizing devices
Description:
Iowa does not use either Type A or C lights on any lane line and taper channelizing devices. ASTM D4956 Type III or IV sheeting on is used. ONLY drums are used in the tapers and either Type I or Type II barricades or vertical panels are allowed on lane lines. For daytime ONLY lane closures, cones may substitute for all of the channelizing devices.
Type A warning lights are used on Type III barricades on Road Closures and on-site detours, plus the lane closing Type III on multilane highways.
Only Type A (or when attention is needed to daytime, Type B) warning lights are used on very select signs, such as SIGNAL AHEAD signs. Warning lights are generally not used on advance warning signs.
Contact:
Mr. Mark R. Bortle
Iowa Department of Transportation
Office of Construction
Traffic Safety/Automation Engineer
800 Lincoln Way
Ames, Iowa 50010
Phone: (515) 239-1587
Fax: (515) 239-1845
Email: mark.bortle@dot.iowa.gov
