SPEED/FLOW RELATIONSHIPS ON RURAL MOTORWAYS AND DUAL CARRIAGEWAYS

The main objective of the study was to develop improved speed/flow relationships which would be applicable to a wider range of gradient characteristics, overall levels of traffic flow and the vehicle composition of the flow on such roads. An additional objective was to undertake an appraisal of the effect on speed/flow relationships of the road geometry, the weather, day of week and time period of day. 21 sites were surveyed, 2 of these being split into 2, making a total of 23 sites for analysis. The sites covered as wide a range of hilliness and bendiness as possible, and full range of road types. Details are given of the site selection and collection of data on journey speed and traffic flow. Multiple linear regression analysis was used to develop models that describe as much of the variation in the observed speeds as possible. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0860500659
• Corporate Authors:

  Planning and Transport Res and Computation Co Ltd

  110 Strand
  London WC2,   England 
• Authors:
  • Coombe, R D
  • Duncan, N C
  • SIMPSON, D
• Conference:
  • Planning & Transport Res & Comp, Sum Ann Mtg, Proc
• Publication Date: 0

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 17-36
• Serial:
  • Issue Number: P184

Subject/Index Terms

• TRT Terms: Conferences; Days; Divided highways; Freeways; Geometry; Highway curves; Highway design; Highway grades; Layout; Linear regression analysis; Mathematical models; Measurement; Regression analysis; Rural areas; Rural highways; Slopes; Speed; Time; Traffic flow; Traffic lanes; Traffic speed; Vehicle mix; Weather; Weeks
• Uncontrolled Terms: Two
• ITRD Terms: 2872: Bend (road); 2992: Carriageway; 8525: Conference; 9007: Day (24 hour period); 2806: Gradient; 2885: Layout; 6473: Mathematical model; 6136: Measurement; 2752: Motorway; 6588: Regression analysis; 328: Rural area; 5408: Speed; 5414: Time; 641: Traffic composition; 671: Traffic flow; 9082: Two; 2545: Weather; 9088: Week
• Subject Areas: Data and Information Technology; Design; Highways; Operations and Traffic Management; Planning and Forecasting; I21: Planning of Transport Infrastructure; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00325640
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 086050-065-9
• Files: ITRD, TRIS
• Created Date: Oct 28 1981 12:00AM