Report numberRA-2012-001
TitleEffectevaluation of speed and red light camera’s at regional roads in Flanders
AuthorsEllen De Pauw
Stijn Daniels
Tom Brijs
Elke Hermans
Geert Wets
Published byPolicy Research Centre for Traffic Safety 2012-2015
Number of pages194
Document languageDutch
Partner(s)Universiteit Hasselt
Work packageWP5: Ranking and evaluation of the measures

In this research report the effects of speed cameras and red light cameras on the road unsafety in Flanders is investigated. The Flemish Government, as road maintenance authority, has placed approximately 256 speed camera’s on road sections. 416 intersections were equipped with red light cameras. These red light cameras monitor both red light driving as well as speed.


The effects on road safety were evaluated on the basis of a comparison of the number of accidents before the installation of the camera with the number of accidents after the commissioning of the camera. Other factors, which also influence road safety, were taken into account as well such as other road safety measures carried out at the research locations, the partial coincidence of the emergence of accidents, changes in traffic volume and trend evolutions in road unsafety.


An analysis of a selection of 65 speed cameras spread over Flanders exhibits, after the exclusion of other factors impacting the number of accidents, a fall of 8% in the number of accidents with personal injury. The number of major accidents (with deadly or seriously injured victims) decreases even stronger, with 29%. This decrease occurs evenly for all types of road users (car drivers, moped riders, cyclists, motorcyclists and pedestrians).


Besides speed cameras also red light cameras were thoroughly evaluated. These are placed at intersections with traffic lights, and register both red light negation and excessive speed. An analysis of 253 cameras showed a rise of 5 to 9% of the total number of injury accidents. This is mainly due to an increase in the number of rear-end collisions with 44%. However, the number of sideward collisions decreased by 6%. This is an important nuance, especially since rear-end collisions mainly lead to minor injuries, while sideward collisions cause more serious injuries. Therefore the number of major accidents at red light cameras is still declining with 14 to 18%.


If we look at the locations where accidents occur, then red light cameras turn out to have a more favourable effect outside built-up areas than in built-up areas, with respectively a decrease of 6% and an increase of 27% in the number of injury accidents. Finally, we see that red light cameras especially ensure a clear fall in the number of injured cyclists (-22%). For other road users, there is no obvious effect.

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The Policy Research Centre for Traffic Safety carries out policy relevant scientific research under the authority of the Flemish Government. The Centre is the result of a

cooperation between Hasselt University, KU Leuven and VITO, the Flemish Institute for Technological Research.


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