Traffic and safety problems caused by construction and maintenance works, road accidents or other traffic incidents, can be considerable. In addition, temporarily obstructed road sections may cause substantial time losses for and inconvenience to road users. The number of obstructions occurring simultaneously for instance on the road network of a large city may run to several hundreds. The resolution of these problems may affect several administrative authorities, various modes of transport and several public utility services. In order to maintain the desired level of service, it is important that new yet internationally uniform methods be developed for guiding traffic through obstructed road sections. The report contains a survey of existing national practices and regulations. The factors affecting the choice of the traffic control systems are reviewed with regard to the various possible obstruction types (isolated obstructions, routes with a series of obstructions, traffic diversions) and the different classes of road. Criteria regarding traffic flow, safety and delay are established, necessary traffic control devices are described, and efficient planning and operation methods are outlined. Special attention is devoted to methods of assessing the economic consequences of obstruction. It is concluded that the economic consequences of road obstructions to the community at large i.e. costs other than those arising directly from construction works or the removal of the obstruction, must be taken into consideration. The report ends with detailed recommendations on future research such as planning of work-sites, operations on single and dual carriageways, signing and control of work-sites. /Author/

  • Corporate Authors:

    Organisation for Economic Cooperation and Development

    Road Research Group, 2 Rue Andre-Pascal
    Paris,   France  75775
  • Publication Date: 1973-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00080846
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: R&D Rept.
  • Files: ITRD, TRIS, ATRI
  • Created Date: May 29 1975 12:00AM