This report discusses the effectiveness of using variable message signs (VMS) and in-vehicle traffic advisory systems (IVU) on a mountainous pass (Snoqualmie Pass on Interstate 90 in Washington state) for changing driver behavior. As part of this project, variable message and variable speed limit information were placed along a 61-km segment of I-90 between North Bend, Wash., and Cle Elum, Wash., where I-90 passes over the Cascade mountains through Snoqualmie Pass. The signs, which were implemented during the winter of 1997-98, provided weather and roadway information to motorists with the intention of reducing the number and severity of accidents.


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    Title :

    TravelAid Summary Report


    Contributors:
    G. F. Ulfarsson (author) / V. N. Shankar (author) / P. Vu (author) / F. L. Mannering (author) / L. N. Boyle (author)

    Publication date :

    2002


    Size :

    30 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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