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Effects of weather-controlled variable message signing on driver behaviour

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Rämä, Pirkko
dc.date.accessioned 2012-02-10T09:31:00Z
dc.date.available 2012-02-10T09:31:00Z
dc.date.issued 2001-11-02
dc.identifier.isbn 951-38-5872-3
dc.identifier.issn 1455-0849
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2211
dc.description.abstract This study investigated the effects of local and frequently updated information about adverse weather and road conditions on driver behaviour. The information was transmitted by several types of variable message signs (VMS). Two evaluations investigated the effects of VMS systems involving an individual sign or two signs; two other evaluations focused on more extensive VMS systems involving several signs, and two evaluations studied the effects of the sign technology. The slippery road condition sign and minimum headway sign decreased the mean speed of cars travelling in free-flow traffic by 1-2 km/h. The minimum headway sign also decreased the proportion of short headways. In addition, drivers' reports suggested that these variable message signs have other effects on driver behaviour, such as the refocusing of attention to seek cues on potential hazards, testing the slipperiness of the road, and more careful passing behaviour. Lowering the speed limit from 100 km/h to 80 km/h on a weather-controlled road decreased the mean speed by an average of 3.4 km/h in winter. The system proved most effective when adverse weather and road conditions were not easy to detect. The system also decreased the standard deviation of speed. Most drivers accepted lowered speed limits and found variable speed limits useful. Variable speed limit signs using fibre-optic technology were found to be more effective than electromechanical signs. However, effective signs may divert the driver's attention from adjacent fixed signing. The slippery road condition sign is recommended for careful use at critical spots, whereas a system including variable speed limits is recommended for somewhat longer road sections. The use of fibre-optic signs is recommended for weather-controlled applications. en
dc.format.extent 55, [50]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher VTT Technical Research Centre of Finland en
dc.publisher VTT fi
dc.relation.ispartofseries VTT publications en
dc.relation.ispartofseries 447 en
dc.relation.haspart Rämä, P. and Kulmala, R. 2000. Effects of variable message signs for slippery road conditions on driving speed and headways. Transportation Research Part F, Vol. 3, pp. 85-94.
dc.relation.haspart Luoma, J., Rämä, P., Penttinen, M. and Anttila, V. 2000. Effects of variable message signs for slippery road conditions on reported driver behaviour. Transportation Research Part F, Vol. 3, pp. 75-84.
dc.relation.haspart Rämä, P. 1999. Effects of weather-controlled variable speed limits and warning signs on driver behavior. Transportation Research Record, 1689, pp. 53-59.
dc.relation.haspart Rämä, P. and Luoma, J. 1997. Driver acceptance of weather-controlled road signs and displays. Transportation Research Record, 1573, pp. 72-75.
dc.relation.haspart Luoma, J. and Rämä, P. 1998. Effects of variable speed limit signs on speed behaviour and recall of signs. Traffic Engineering + Control, Vol. 39, pp. 234-237.
dc.relation.haspart Rämä, P., Luoma, J. and Harjula, V. 1999. Distraction due to variable speed limits. Traffic Engineering + Control, Vol. 41, pp. 428-430.
dc.subject.other Transport engineering en
dc.title Effects of weather-controlled variable message signing on driver behaviour en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Industrial Engineering and Management en
dc.contributor.department Tuotantotalouden osasto fi
dc.subject.keyword traffic signs en
dc.subject.keyword speed limit en
dc.subject.keyword variable message signs en
dc.subject.keyword VMS en
dc.subject.keyword cold weather en
dc.subject.keyword driver behavior en
dc.subject.keyword road condition en
dc.subject.keyword slippery en
dc.subject.keyword evaluation en
dc.subject.keyword information systems en
dc.subject.keyword winter en
dc.subject.keyword road surface en
dc.subject.keyword ice en
dc.subject.keyword traffic safety en
dc.identifier.urn urn:nbn:fi:tkk-001812
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en

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