DRIVER EXPECTANCIES AT FREEWAY LANE DROPS (ABRIDGMENT)

In general, the data indicate that the selection of exit panels for special applications should be influenced by the type of sign selected (diagrammatic or conventional) and the direction in which the exit diverges from the roadway (EXIT ONLY panels are superior to MUST EXIT panels at left exits). Based on the research to date, it seems clear that exit panels significantly improve the correctness of driver expectations of freeway interchange geometrics in terms of lane drop configurations. Of all messages tested, the MUST EXIT and EXIT ONLY panels were the most helpful in correctly influencing expectations. The difference in efficiency of these messages seems small, and probably either one could be adopted. In the interest of improving the accuracy of driver expectancies, it would seen that only one exit panel message should be used. Diagrammatic signs appear to have influenced expectancies favorably, but the cost factors associated with installing this type of sign where conventional signs now exist may make their use prohibitive in the near future. Exit panels affixed to existing conventional signs may offer a sufficient short-term solution.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1976/600/600-010.pdf
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=DRIVER+EXPECTANCIES+AT+FREEWAY+LANE+DROPS+(ABRIDGMENT)&author=K.+ROBERTS&author=A.+Klipple&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Motorist Information Systems.. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • ROBERTS, KING M
  • Klipple, Alfred G
• Conference:
  • 55th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1976-1-19 to 1976-1-23
• Publication Date: 1976

Media Info

• Media Type: Digital/other
• Features: Figures; Photos;
• Pagination: pp 42-44
• Monograph Title: Motorist information systems and services
• Serial:
  • Transportation Research Record
  • Issue Number: 600
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Behavior; Costs; Diagrams; Drivers; Interchange ramps; Lane drops; Signs; Symbols
• Uncontrolled Terms: Diagrammatic signs; Sign legend
• Old TRIS Terms: Freeway entrances and exits
• Subject Areas: Finance; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00153135
• Record Type: Publication
• ISBN: 0309025699
• Files: TRIS, TRB
• Created Date: May 31 1977 12:00AM