THE EFFECT OF THE WIDTH OF SUBURBAN ROADS ON THE MEAN FREE SPEED OF CARS

The paper describes the results of field investigations carried out on untroubled roads in Belfast to derive an expression in quantitative terms. The spot speeds of cars under free flow conditions were measured using a cine-camera to film their passage along streets of various widths. The camera was placed in a side street perpendicular to the line of travel so that it could not be seen by approaching drivers. The results are tabulated and an expression derived showed that the mean free speed increased linearly with carriageway width within the range of 5.2 to 11.3 M. Speeds were measured in dry conditions during off peak periods on Friday afternoons. Measurements made with the road wet showed a decrease in speed of about 10 per cent. /TRRL/

Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
Corporate Authors:
Printerhall Limited

29 Newmart Street
London W1P 3PE, England
Authors:
- Farouki, O T
- Nixon, W J
Publication Date: 1976

Language

English

Media Info

Features: Figures; References; Tables;
Pagination: p. 518-519
Serial:
- Traffic Engineering & Control
- Volume: 17
- Issue Number: 12
- Publisher: Hemming Group, Limited
- ISSN: 0041-0683
- Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

TRT Terms: Automobiles; Average; Cinematography; Dryness; Highways; Mean (Statistics); Measurement; Moisture content; Pavements; Roads; Speed; Spot speed; Suburbs; Surface course (Pavements); Urban areas; Wet weather; Width
Uncontrolled Terms: Dry conditions; Free speed; Wet conditions; Wet pavements
Geographic Terms: United Kingdom
Old TRIS Terms: Mean (Statistical)
ITRD Terms: 6549: Average; 1243: Car; 6752: Cinematography; 2755: Highway; 5408: Speed; 304: Suburbs; 8119: United Kingdom; 313: Urban area; 3015: Wet road; 6479: Width
Subject Areas: Highways; Operations and Traffic Management; Pavements; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

Accession Number: 00153342
Record Type: Publication
Source Agency: Transport and Road Research Laboratory (TRRL)
Report/Paper Numbers: Analytic
Files: ITRD, TRIS
Created Date: Sep 20 1977 12:00AM