SATISFACTORY-RESTRICTED-POOR VEHICLE MOBILITY - AN ATTEMPT TO DESCRIBE FUTURE TRAFFIC CONDITIONS

GOD-BEGRAENSAD-DAALIG FRAMKOMLIGHET - ETT FOESOEK ATT BESKRIVA FRAMTIDA TRAFIKFOERHAALLANDEN

In traffic engineering design, capacity is defined in two ways, the number of vehicles per hour passing the installation, and the mean summer day traffic at some future date or the mean annual day traffic in the year of opening. A survey on the west coast of sweden deviated from the usual procedure. The reasons were that the area contains a large number of holiday houses and the ratio of summer to winter traffic is abnormal; the area contains long bridges; present investment position does not permit road improvements; and laymen (politicians) also have to understand the forecasts. The mean annual day traffic and diurnal variations were predicted for 1985 and 2000. Different forecasts were made for whole-year and holiday traffic; by superimposing these, characteristic daily ranking curves were obtained giving the number of days with satisfactory, restricted and poor vehicle mobility. These concepts are defined. It is shown that the bridges at tjoern island will have poor conditions in 1985 for about 80 days; conditions will be satisfactory for only 100 days. Existing approach roads must therefore be improved. Another bridge will relieve road conditions, but vehicle mobility in 2000 will nevertheless be poor over half the summer. /TRRL/

  • Authors:
    • Ahlbaeck, I
  • Publication Date: 1974

Language

  • Swedish

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 7-11
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00125639
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM