00196608

Component

http://onlinepubs.trb.org...s/trr/1978/682/682-017.pdf

https://scholar.google.co...enke&publication_year=1978

This paper discusses the ability of drivers to perceive traffic flow quality on the basis of A,B,C,D,F, grading scale signs along major freeways, when F is total congestion and A is the smoothest, fastest flow possible. In Hennepin County, Minnesota, driver perception was evaluated by using questionnaires. It was found that 52 percent of the respondents correctly identified the correct definition. Also it was found that peak-hour users were more sure and more accurate in their responses, and those who had heard or read about the grade signs were more able to correctly define the meanings. Overall, the survey findings demonstrate that a significant majority of drivers can correctly interpret the meanings of the traffic-condition grades A,B,C,D,F. This ability could be improved by more effective media publicity. The survey also demonstrates that many drivers use the information communicated by the grade in their subsequent route-choice process and travel. Therefore, it can be concluded that the criteria of understanding and use are met and that the traffic grade concept is valid.

Publication of this paper sponsored by Committee on Freeway Operations.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

01411521

pp 105-108

1978

Transportation Research Record

57th Annual Meeting of the Transportation Research Board

0309028272

Print

Figures (1) ; Photos

Data collection; Driver information systems; Drivers; Freeways; Grading (Earthwork); Perception; Questionnaires; Route choice; Surveys; Traffic flow; Travel patterns; Urban areas; Validity

Grading

Highways; Operations and Traffic Management; Safety and Human Factors

TRIS, TRB

Sep 15 1979 12:00AM

• ALTERNATIVE OBJECTIVES IN ARTERIAL-TRAFFIC MANAGEMENT
• ANALYSIS OF DRIVER RESPONSES TO POINT DIVERSION FOR SPECIAL EVENTS
• APPLICATION OF FREEWAY-CORRIDOR ASSIGNMENT AND CONTROL MODEL
• DERIVATION OF FREEWAY SPEED PROFILES FROM POINT SURVEILLANCE DATA. ABRIDGMENT
• DEVELOPMENT OF EFFICIENT PROCEDURE FOR RECREATING AND ANALYZING TRAFFIC FLOW PATTERNS ON URBAN FREEWAYS
• DISTANCE REQUIREMENTS FOR FRONTAGE-ROAD RAMPS TO CROSS STREETS: URBAN FREEWAY DESIGN
• EVALUATION OF REDUCTION IN MINIMUM OCCUPANCY FOR CAR POLLS THAT USE A PRIORITY FREEWAY LANE
• FIELD EVALUATION OF MESSAGES FOR REAL-TIME DIVERSION OF FREEWAY TRAFFIC FOR SPECIAL EVENTS
• FREEWAY INCIDENT-DETECTION ALGORITHMS BASED ON DECISION TREES WITH STATES
• INCIDENT DETECTION: A BAYESIAN APPROACH
• METHODOLOGY FOR EVALUATION OF ALTERNATIVE LOW-COST FREEWAY-INCIDENT MANAGEMENT TECHNIQUES. ABRIDGMENT
• OPTIMIZATION OF LARGE TRAFFIC SYSTEMS
• PREDICTING EFFECTIVENESS OF TRANSPORTATION SYSTEM MANAGEMENT MEASURES
• PUBLIC REACTION TO PRIORITY LANE FOR BUSES AND CAR POOLS IN MIAMI
• QUEEN ELIZABETH WAY FREEWAY SURVEILLANCE AND CONTROL SYSTEM DEMONSTATION PROJECT
• ROLE OF PARKING IN TRANSPORTATION SYSTEM MANAGEMENT
• STIMULUS-RESPONSE LANE-CHANGING MODEL AT FREEWAY LANE DROPS. ABRIDGMENT