The execution of roadworks on single carriageway roads often requires the closure to traffic of all except one lane of the carriageway. Alternate one-way working of the two opposing streams of the traffic may then be operated as the single running lane using one of the following methods of control. (1) no specified priority, (2) signed priority, (3) fixed time (ft) and vehicle actuated (va) traffic signals, and (4) manually operated stop/go signs. The study presented in this paper sought to determine the range of site and traffic conditions in which the first three of these systems operate satisfactorily and to compare user delay. In the case of method 3 the performance of a proposed modification of the signal cycle to improve the efficiency of signal control has been evaluated in addition to that of existing fixed time and vehicle actuated operation. The results of the study have been used to determine a rank order of preference for the system based on minimising user delay for various ranges of site length and flow which may be used as a means of selecting the optimum control method for a particular roadwork. The performance of the systems has been compared using a computer simulation model because of the difficulty of obtaining comparable data over a wide range of conditions on the public road. (TRRL)

  • Availability:
  • Supplemental Notes:
    • Highway Construction and Maintenance Proceedings of Seminal P Held at the PTRC Summer Annual Meeting.
  • Corporate Authors:

    Planning and Transport Res and Computation Co Ltd

    109 Bedford Chambers, 4 King Street
    London,   England 
  • Authors:
    • Summersgill, I
  • Conference:
  • Publication Date: 1979

Media Info

  • Features: Figures; References;
  • Pagination: p. 181-191
  • Serial:
    • Issue Number: P185

Subject/Index Terms

Filing Info

  • Accession Number: 00324969
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 086050-066-7
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM