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Evaluation of Messages on Changeable Message Signs as a Speed Control Measure in Highway Work Zones



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  • Personal Author:
  • Description:
    The objective of this study is to measure the effectiveness of three commonly used changeable message sign (CMS) messages in reducing vehicular speeds and variances in highway work zones. This paper presents the results of a field study conducted on Interstate-90 in western New York State to evaluate the use of three different types of messages displayed on a CMS, as a speed control measure. The study included speed measurements of nearly 180,000 vehicles. The three types of CMS messages tested were: (1) RIGHT|LANE|CLOSED-KEEP|LEFT RIGHT|LANE|CLOSED-KEEP| LEFT; (2) WORK ZONE|MAX SPEED|45MPH-BE| PREPARED| TO STOP WORK ZONE|MAX SPEED|45MPH-BE|PREPARED|TO STOP; and (3) LEFT|LANE|CLOSED-KEEP| RIGHT LEFT|LANE|CLOSED-KEEP|RIGHT. Of the three CMS messages tested, the CMS message stating "WORK ZONE|MAX SPEED|45MPH-BE| PREPARED|TO STOP WORK ZONE|MAX SPEED|45MPH-BE| PREPARED| TO STOP " proved the most effective, significantly reducing vehicle speeds by 3.3-6.7mi/h 3.3-6.7mi/h (5.3-10.8km/h) (5.3-10.8km/h) . The other two CMS messages were not as effective. The standard deviation of speed for the CMS message: WORK ZONE|MAX SPEED|45 MPH-BE|PREPARED| TO STOP WORK ZONE|MAX SPEED|45MPH-BE| PREPARED|TO STOP increased by 1.1-1.7mi/h 1.1-1.7mi/h (1.8-2.7km/h) (1.8-2.7km/h) in the driving lane and 0.2-2.0mi/h 0.2-2.0mi/h (0.3-3.2km/h) (0.3-3.2km/h) in the passing lane. The speed variances for the other two CMS messages ranged from -2.00 to 1.13mi/h -2.00 to 1.13mi/h (from -3.23km/h to 1.83km/h -3.23km/h to 1.83km/h). [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    1084-0680
  • Document Type:
    Text
  • Funding:
    Cooperative Agreement
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    11-18
  • Volume:
    13
  • Issue:
    1
  • NIOSHTIC Number:
    nn:20057510
  • Citation:
    Pract Period Struct Des Constr 2008 Feb; 13(1):11-18
  • Contact Point Address:
    Wesley C. Zech, Assistant Professor, Dept. of Civil Engineering, Auburn Univ., 233 Harbert Engineering Center, Auburn, AL 36849-5337
  • Email:
    zechwes@auburn.edu
  • Federal Fiscal Year:
    2008
  • NORA Priority Area:
    Research Tools and Approaches: Surveillance Research Methods
  • Performing Organization:
    Research Foundation of State University of New York, Buffalo, New York
  • Peer Reviewed:
    True
  • Start Date:
    19990930
  • Source Full Name:
    Practice Periodical on Structural Design and Construction
  • End Date:
    20030930
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:a6672c884439c9d746722555b6ea333da30e083d05ee4b491e323a6d2c5b6f17f4e2e42c10851106b87c87e54425a6a3098744f6968ddafa839f61c11e552d26
  • Download URL:
  • File Type:
    Filetype[PDF - 1.46 MB ]
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