Abstract
The goal of section speed control is to increase speed limit compliance in the monitored road sections, decrease speed variance and improve traffic safety. General experience with section speed control on motorways is positive, with significant improvements in both speed and safety performance. The presented study focused on a unique application of section speed control in motorway work zones in the Czech Republic. Effectiveness was monitored (in terms of average speed, speeding and accident rates) in three sections and four time periods (normal operation, work zone, work zone with section speed control, normal operation), which allowed discerning individual effects of work zone and section speed control. In addition, a novel data source—floating car data—was used. Work zones were found to increase accident rates compared to normal operation and decrease with the introduction of section speed control. The effects on average speed, speed variance and speeding were positive, although smaller compared to the studies conducted in non-work zone conditions.
Highlights
Speed has been recognised as the most influential risk factor
The reported study aimed to evaluate the effectiveness of section speed control in Czech motorway work zones
We monitored the effectiveness in three sections and four time periods
Summary
Speed is an essential contributory factor in around 30% of fatal accidents [1] This proportion may be even higher, for example, on Czech roads, speeding has been attributed to approx. The cameras detect and identify vehicles through automatic number plate recognition and optical character recognition Using time of such detections and the distance between them, the average speed of a vehicle is calculated. Various international studies focused on the effectiveness of SSC in terms of the reduction of average speed and/or accident frequency. Their experience was generally positive—significant reductions in both speeds and accidents were found. The presented study aimed to fill this gap by assessing the effectiveness of SSC in selected Czech motorway work zones.
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