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Abstract:
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This paper reports on driver' surveys regarding the effects of speed enforcement cameras in Israel. Yearly surveys were taken between 2010 and 2013 in 9 gas stations. Overall 1,993 drivers were interviewed. 38% of the drivers in 2010, 21% in 2011, 13% in 2012 and 11% in 2013 reported that their driving speed was above the perceived speed limit (SL). In all years the majority of drivers predicted positive impact of speed cameras on safety. The main stated explanation for speed limit violations was time pressure. Respecting the speed limit was attributed to enforcement rather than safety concerns. Linear and sigmoidal models were applied to describe the linkage between reported driving speed (dependent) and perceived SL (independent). The sigmoidal model fitted the data better especially at high levels of the perceived SL. That is, although the perceived SL increased, at some point the reported driving speed leveled off. Moreover, the upper asymptote decreased from 113.22 km/h in 2010 to 88.92 km/h in 2013. A wide variance in perceived SL suggests that many drivers may not know what the speed limits really are.
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