EVALUATION OF DIAGRAMMATIC SIGNING AT CAPITAL BELTWAY EXIT 1

A CONVENTIONAL SIGN ON THE WESTBOUND APPROACH TO EXIT 1 OF THE CAPITAL BELTWAY WAS REPLACED BY A DIAGRAMMATIC SIGN TO DETERMINE THE EFFECT OF THE NEW SIGN ON DRIVER BEHAVIOR. BEFORE AND AFTER PHASES OF THE STUDY EVALUATED THE EFFECTS OF THE SIGN IN TERMS OF ERRATIC MANEUVERS, WHICH WERE CLASSIFIED INTO THE FOLLOWING TYPES: WEAVING (ACROSS SOLID LINE AND GORE AREA), HESITATING, STOPPING-BACKING, AND PARTIAL WEAVING. THE ANALYSIS OF EACH MANEUVER WITHIN DESIGNATED ZONES THROUGHTOUT THE INTERCHANGE REVEALED THE NUMBERS OF MANEUVERS AT CRITICAL POINTS. AFTER THE DIAGRAMMATIC SIGN WAS INSTALLED, WEAVING MANEUVERS IN THE GORE AREA DECREASED; PARTAIL WEAVES INCREASED, BUT VEHICLE HESITATIONS AND STOPPING OR BACKING WERE FEWER; AND ACCIDENTS WERE REDUCED 35 PERCENT DURING 11 MONTHS.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1972/414/414-007.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309020867
• Supplemental Notes:
  • Sponsored by Commiteee 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:
  • Hanscom, Fred R
• Conference:
  • 51st Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1972-1-17 to 1972-1-21
• Publication Date: 1972

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 50-58
• Monograph Title: Motorist information systems
• Serial:
  • Highway Research Record
  • Issue Number: 414
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Behavior; Diagrams; Drivers; Evaluation; Freeways; Guide signs; Legibility; Signs; Traffic crashes; Traffic signs; Weaving traffic
• Uncontrolled Terms: Diagrammatic signs
• Old TRIS Terms: Freeway signs
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226601
• Record Type: Publication
• ISBN: 0309020867
• Files: TRIS, TRB
• Created Date: Apr 2 1973 12:00AM