THE EFFECT OF THE 50 MILE/H LIMIT ON SPEEDS AND HEADWAYS AT THE NORTHERN END OF THE M1 MOTORWAY

During December 1973 speeds and headways were measured by radar at the northern end of the M1 motorway. Measurements made on the slow and centre lanes were analysed separately to determine mean speeds of passenger cars including light commercial vehicles and mean speeds of heavy and medium commercial vehicles. It was found that the effect of the speed limit was to reduce mean speeds by about 10 mile/h and to decrease standard deviation of speeds. The limit did not appear to affect headway distributions. /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:
  • SALTER, R J
• Publication Date: 1974-8-9

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 772-773
• Serial:
  • Traffic Engineering & Control
  • Volume: 15
  • Issue Number: 16/1
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Automobiles; Average spot speed; Average travel speed; Freeways; Headways; Impacts; Measurement; Radar; Speed; Speed limits; Standard deviation; Traffic speed; Trucks; Vehicle spacing
• Geographic Terms: United Kingdom
• ITRD Terms: 5409: Average speed; 1243: Car; 6136: Measurement; 2752: Motorway; 6738: Radar; 5408: Speed; 624: Speed limit; 8119: United Kingdom; 694: Vehicle spacing
• Subject Areas: Highways; Motor Carriers; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00096735
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1975 12:00AM