The aim of the present study was to examine if there are differences in drivers¦ propensity to have different types of intelligent speed adaptationinstalled in their cars depending on the sample of drivers (i.e. Swedish or Turkish), their aberrant driving behaviours (i.e. violations and errors), and/or the technical solution used (i.e. speed limit information, advisory, supportive and intervening systems). A sample of 224 Swedish and 316 Turkish drivers completed a questionnaire including questions based on thedriver behaviour questionnaire (DBQ) as well as questions about the drivers¦ propensity to have different types of intelligent speed adaptation installed in their cars. The results showed that the Swedish sample of drivers was less positive than the Turkish sample of drivers towards having the advisory, supportive and intervening systems installed. Furthermore, drivers who frequently commit violations were less positive towards having any of these systems installed than were drivers who commit violations less frequently, while drivers who frequently make errors were more positive towards having the systems installed than were drivers who make errors less frequently. Both the Swedish and the Turkish sample of drivers were most positive towards having the speed limit information system installed, followed by the advisory system on second place, the supportive system on third place and lastly the intervening system on fourth place.
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