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Citation |
Haglund M, Åberg L. Transp. Res. F Traffic Psychol. Behav. 2002; 5(3): 177-188. |
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Copyright |
(Copyright © 2002, Elsevier Publishing) |
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DOI |
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PMID |
unavailable |
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Abstract |
Repeated speed measurements were obtained to examine drivers' consistency in speed choice. Drivers were observed at two locations along a route or for two days at the same location. Single carriageway roads were used with posted speed limits of 70 and 90 km/h. Correlation coefficients between repeated speed measures ranged from .49 to .81 for free-flowing vehicles. Higher consistency between measures was found where segments of the road were homogenous. Consistency in relation to speed limit varied as a function of roads and direction of travel. From 4% to 41% of the drivers observed legal speeds at both sites and between 43% and 100% travelled over the speed limits at both sites. The results are discussed in terms of using self-reported speed in driver surveys and modelling of driver behaviour. |