The study is concerned with the evaluation of real-time changeable message signs that inform motorists of freeway traffic conditions. Included in the study is an evaluation of the use of a letter-grade rating scale for indicating freeway conditions. Evaluation was accomplished through the use of a questionnaire survey and a traffic operations analysis. The study results showed that the changeable message signs were effective in providing information to the motorist. Considerable motorist diversion was noted during analysis incidents which were accompanied by a 'LANE BLOCKED' display. The signs were highly visible, generally understood, and useful within the constraints of corridor geometry. Lack of understanding of the letter-grade rating scale employed was attributed to the fact that the scale was not anchored to a readily understandable base. Questionnaire results showed that a vast majority of the respondents found the system useful.


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    Title :

    Evaluation of a Changeable Message Sign System on the Inbound Gulf Freeway


    Contributors:
    W. R. Stockton (author) / C. L. Dudek (author) / D. B. Fambro (author) / C. J. Messer (author)

    Publication date :

    1975


    Size :

    108 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






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