Study Details
Study Title: To brake or to accelerate? Safety effects of combined speed and red light cameras
Authors: De Pauw et al.
Publication Date:APR, 2014
Abstract: Introduction: The present study evaluates the traffic safety effect of combined speed and red light cameras at 253 signalized intersections in Flanders, Belgium that were installed between 2002 and 2007. Method: The adopted approach is a before-and-after study with control for the trend. Results: The analyses showed a non-significant increase of 5% in the number of injury crashes. An almost significant decrease of 14% was found for the more severe crashes. The number of rear-end crashes turned out to have increased significantly (+44%), whereas a non-significant decrease (-6%) was found in the number of side crashes. The decrease for the severe crashes was mainly attributable to the effect on side crashes, for which a significant decrease of 24% was found. Practical Applications: It is concluded that combined speed and red light cameras have a favorable effect on traffic safety, in particular on severe crashes. However, future research should examine the circumstances of rear-end crashes and how this increase can be managed.
Study Citation: De Pauw, E, S. Daniels, T. Brijs, E. Hermans, and G. Wets. "To brake or to accelerate? Safety effects of combined speed and red light cameras". Journal of Safety Research, Vol. 50, (2014) pp.59-65.
CMFs Associated With This Study
Category: Speed management
Countermeasure: Installation of fixed combined speed and red light cameras
| CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
|---|
| 1.05 | -5 |  | All | All | Not specified | All |
| 0.94 | 6 | | Sideswipe | All | Not specified | All |
| 0.76 | 24 | | Sideswipe | K,A | Not specified | All |
| 1.14 | -14 | | Angle,Left turn | All | Not specified | Urban |
| 0.82 | 18 | | Angle,Left turn | All | Not specified | Rural |
| 0.89 | 11 | | Angle,Left turn | All | Not specified | All |
| 0.93 | 7 | | Angle,Left turn | All | Not specified | All |
| 1.06 | -6 | | Angle,Left turn | All | Not specified | All |
| 0.97 | 3 | | Angle,Left turn | All | Not specified | All |
| 0.83 | 17 | | Angle,Left turn | All | Not specified | All |
| 0.82 | 18 | | Angle,Left turn | All | Not specified | All |
| 1.11 | -11 | | Angle,Left turn | All | Not specified | All |
| 1.7 | -70 | | Rear end | All | Not specified | Urban |
| 1.33 | -33 | | Rear end | All | Not specified | Rural |
