Effects of variable message signs for slippery road conditions on reported driver behaviour

Juha Luoma (Corresponding Author), Pirkko Rämä, Merja Penttinen, Virpi Anttila

    Research output: Contribution to journalArticleScientificpeer-review

    33 Citations (Scopus)

    Abstract

    A field study by Rämä and Kulmala (Rämä, P., Kulmala, R. (2000). Effects of variable message signs for slippery road conditions on driving speed and headways. Transportation Research, Part F, 3, 85–94.) showed that a variable message sign warning about slippery road conditions reduced the mean speed by 1–2 km/h. The study also showed that a variable message sign recommending a minimum headway between vehicles decreased the proportion of short headways. However, the signs may have other effects on driver behaviour besides those measurable in terms of speed and headway, and this study was designed to investigate such potential effects. In total, 114 drivers who had encountered the slippery road condition sign and 111 drivers who had encountered the sign showing recommended minimum headway in adverse road surface conditions were interviewed. The results suggested that these variable message signs do indeed have other effects, such as the refocusing of attention to seek cues on potential hazards, testing the slipperiness of the road, and more careful passing behaviour. On the other hand, the results suggested that driving speed and headway are essential variables with which many other variables correlate.

    Original languageEnglish
    Pages (from-to)75 - 84
    Number of pages10
    JournalTransportation Research Part F: Traffic Psychology and Behaviour
    Volume3
    Issue number2
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

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