Automated Speed Photo Enforcement Effects on Speeds in Work Zones

  title={Automated Speed Photo Enforcement Effects on Speeds in Work Zones},
  author={Rahim F. Benekohal and Madhav V. Chitturi and Ali Hajbabaie and Ming-Heng Wang and Juan Camilo Medina},
  journal={Transportation Research Record},
  pages={11 - 20}
Automated speed enforcement in construction zones has the potential to increase compliance with the speed limit and improve safety. The effectiveness of speed photo enforcement (SPE) (by radar) in reducing speeds and increasing speed limit compliance in work zones was evaluated for the first time in the United States, at Illinois work zones. Details are presented on SPE implementation and its effectiveness at the point it was stationed and at a downstream location in a work zone. Speed data… 

Figures and Tables from this paper

Effectiveness of automated speed enforcement in work Zones

Automated speed-radar photo enforcement (SPE) is being used by several states to reduce speeding and improve safety in highway work zones. This study examines three data sets from Illinois to

Downstream Effects of Speed Photo–Radar Enforcement and Other Speed Reduction Treatments on Work Zones

The effects of automated speed photo–radar enforcement (SPE) and traditional speed reduction treatments (speed feedback trailer, presence of police vehicles with emergency lights on and off, and

Evaluation of Photo Speed Enforcement (PSE) in California Work Zones

Exceeding the speed limit in highway work zones is a safety problem for highway workers and the traveling public. Adherence to the posted speed limits can provide safety benefits by reducing the

Using Connected Vehicle Trajectory Data to Evaluate the Impact of Automated Work Zone Speed Enforcement

Work zone safety is a high priority for transportation agencies across the United States. Enforcing speed compliance in work zones is an important factor for reducing the frequency and severity of

Evaluation of Spatial and Temporal Speed Limit Compliance in Highway Work Zones

The study is perhaps the largest ever conducted with respect to concurrent enforcement and extensive space mean measurement and represents an upper bound on the impact of enforcement activity on work zone speeds.

Sustained and Halo Effects of Various Speed Reduction Treatments in Highway Work Zones

This paper analyzes the speed reductions achieved with the use of an automated speed photo–radar enforcement (SPE) system in highway work zones. A comparison with the following three traditional


This paper investigated the headway distribution of platooning vehicles, presence of very short headways (<0.7secnond), and frequency of applying of brakes and changing lane in work zones with and

Four-Regime Speed–Flow Relationships for Work Zones with Police Patrol and Automated Speed Enforcement

This paper presents the development of a four-regime speed–flow relationship for highway work zones and the effects of police presence (police) and speed photo enforcement (SPE) on the speed–flow

Using Anonymous Connected Vehicle Data to Evaluate Impact of Speed Feedback Displays, Speed Limit Signs and Roadway Features on Interstate Work Zones Speeds

Annually, there are over 120,000 crashes in work zones in the United States. High speeds in construction zones are a well-documented risk factor that increases the frequency and severity of crashes.

Influence of work zone signage on driver speeding behavior

This study evaluates the influence of three different work zone signs—speed photo enforced signs, dynamic speed display signs and reduced speed limit signs—on driver speeding behavior using a medium-fidelity driving simulator.



Speed and safety effect of photo radar enforcement on a highway corridor in British Columbia.

Comparative Study of Speed Reduction Effects of Photo-Radar and Speed Display Boards

Two forms of automated motor-vehicle speed control, speed display boards and photo-radar, are compared. Despite a growing body of research on the devices, there is little reliable empirical evidence

Evaluation of the speed camera program in Victoria

Phase 3 tests for a reduction in casualty crash frequency and severity where speed cameras were used in Melbourne from 1 July 1990 to 31 December 1991 concluded that the percentage of vehicles exceeding the speed limit by more than 15 km/h decreased from November 1989 to March 1990 and remained at a lower level in both 60km/h and 75 km/H speed zones.


One of the major factors that should be considered in selecting the speed limit for a stretch of highway is safety. It is generally accepted that the level of safety depends on certain


The inconclusive evidence in support of retaining the 55 mph speed limit is discussed and the costs and benefits involved are noted to hinge on several value-laden questions that traffic engineers

The Effect of Enforcement on Speed Behaviour: A Literature Review

  • Dutch Institute for Road Safety Research, Leidschendam,
  • 1998

The Work Zone Traffic Control Committee sponsored publication of this paper

  • Phase 5: Further Investigation of Localised Effects on Casualty Crash Frequency
  • 1990