Best Practice

BEST PRACTICE:

G4−6: Reduced Speed When Flashing

DESCRIPTION:

Used since 1989−90, this practice allows for normal speed driving in portions of a work zone where actual construction work is not in progress. A reduced speed limit (at least 10 mph below the posted limit) when flashing sign is only activated when in the vicinity of actual construction activity. Other areas within the contract limits are permitted to travel at a greater speed.

REASON(S) FOR ADOPTING:

This practice was initially developed for lengthy Interstate projects. Previously the only practical way to obtain a reduced speed through the construction zone was to post the entire length. However, the Indiana Department of Transportation received several complaints about reduced speed for a 10 mile section of road, when actual visible construction was only occurring in a 2 mile section. Motorists tended to disregard the speed restriction when they did not see workers present.

PRIMARY BENEFIT(S):

Vehicular traffic does slow down in work areas where construction workers and activities are present, which provides for increased worker and motorist safety. In areas where activities are not taking place, motorists can travel at a higher rate of speed thus improving efficiency and mobility.

MOST APPLICABLE LOCATION(S)/PROJECT(S):

All types of facilities with speed limits greater than 45 mph. All types of work.

STATE(S) WHERE USED:

Indiana

SOURCE/CONTACT(S):

Mark Miller, Director, Construction Management Division, Indiana DOT
Phone: (317) 232−5456
E−mail: mrmiller@indot.in.gov