AUTOMATIC CLOSE-FOLLOWING WARNING SIGN AT ASCOT
A system, which measures the time-gap between successive vehicles and illuminates a warning sign if this gap is less than a pre-set level, is shown to affect the close-following behaviour of drivers on the A332 at Ascot. To test the effectiveness of the sign, measurements of inter-vehicle gaps were made at two points, 330 metres and 880 metres, "downstream" from the sign. An improvement of about one third in the proportion of drivers following at less than 1.0 second was detected at both monitor points, after installation of the sign. There was no statistically significant reduction in this effect over the five year period of the experiment. The number of accidents was insufficient to indicate whether there had been a reduction associated with the operation of the sign. (Author/TRRL)
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Corporate Authors:
Transport and Road Research Laboratory (TRRL)
Wokingham, Berkshire United Kingdom -
Authors:
- HELLIAR-SYMONS, R D
- Publication Date: 1983
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: 16 p.
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Serial:
- TRRL LABORATORY REPORT
- Issue Number: 1095
- Publisher: Transport and Road Research Laboratory (TRRL)
Subject/Index Terms
- TRT Terms: Before and after studies; Behavior; Drivers; Evaluation and assessment; Headways; Measurement; Measures of effectiveness; Sensors; Time; Traffic signs; Vehicle spacing; Warning signs; Warning systems
- Uncontrolled Terms: Effectiveness
- Geographic Terms: United Kingdom
- ITRD Terms: 9020: Evaluation (assessment); 685: Headway; 6136: Measurement; 6120: Sensor; 5414: Time; 553: Traffic sign; 8119: United Kingdom; 694: Vehicle spacing; 9113: Warning
- Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I83: Accidents and the Human Factor;
Filing Info
- Accession Number: 00382831
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Report/Paper Numbers: HS-037 108
- Files: HSL, ITRD, TRIS, ATRI
- Created Date: May 30 1984 12:00AM