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Roadway Operations & Maintenance > Work Zone Management > Speed Enforcement


Automated speed detection in work zones can enable automated ticketing of vehicles exceeding posted speed limits when combined with automatically triggered vehicle identification technologies such as photographs, still or video digital imaging, or license plate recognition. Some systems transmit images of offending vehicles to police officers downstream of the work zone where enforcement can be carried out more safely.


During system testing, CV Pilot sites discover the importance of having expertise in detecting and mitigating interferences with radio frequency and GPS signals(12/13/2018)

Refine institutional arrangements when deploying connected vehicle technology to outline the expectations of partners in terms of service, outcomes and reporting.(12/13/2018)

Refine proper antenna placement on connected vehicles (particularly commercial vehicles) to reduce DSRC ‘shadow’ areas where DSRC signal is degraded.(12/13/2018)

Connected vehicle deployers are encouraged to utilize multi-vendor outsourcing and to source suppliers early to create a collaborative environment that enables as much parallel work as possible.(12/13/2018)

Connected vehicle deployers should assess field equipment and organizational capabilities that will be needed to support core CV components.(12/13/2018)

Deploy automated speed enforcement with dynamic "your speed" signs in work zones to heighten visual attention from drivers.(01/01/2016)

Augmented speed enforcement system in work zone significantly reduced the number of vehicles traveling in excess of 65 mph(01/01/2013)

A photo-radar enforcement van reduced the number of speeding vehicles in a work zone by 24 percent.(April 2010)

Speed photo-radar enforcement decreased average car speeds in work zones up to 7.9 mi/hr in median lanes and 7.7 mi/hr in shoulder lanes at highway work zones, being equally as effective as the presence of police patrols with emergency lights off.(January 2010)

In Texas, police who used remote camera/radar systems to enforce work zone speed limits noted improved safety to officers, but expressed some concern over effectiveness in identifying speeding vehicles.(13-17 January 2002)

Speed display trailers can reduce average vehicle speeds by 5 mi/hr and decrease the number of vehicles traveling at excessive speeds in rural work zones. (2000)

In Nebraska, a portable speed detection and warning system placed upstream from an I-80 work zone decreased the highest 15 percent of vehicle speeds by about 5 mi/hr as vehicles approached the work zone lane merge area.(May 2000)

Speed-activated dynamic message signs with warning messages reduced vehicle speeds by 8 to 9 mi/hr; sustained effects for long-term work zones.(December 1998)

At a work zone in South Dakota, a speed monitoring and display system reduced the number of speeding passenger vehicles and trucks by as much as 25 and 40 percent respectively.(1995)

Speed activated dynamic message signs (DMS) with warning messages reduced speeding vehicles by 50 percent or more in Virginia work zones. (August 1994)

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