A mathematical model is presented for determining the cases where it would be justified to have a braking lane along the right hand lane at a crossing of minimum characteristics on a rural two-lane road. It is supposed that there is no interference to the turning of the two vehicles analysed. No account is taken of the type of crossing, or of the angle formed by the axes, or the type of carriageway, nor of the composition of the traffic, or the factors (such as lateral objects and weather conditions) which affect visibility and braking distances. It is also admitted that a braking lane is justified when the proportion of vehicles upset by the turning manouevre of those in front is greater than 10% of the total. The proposed model is based on the Poisson distribution for the probability of a turning vehicle, which is well adapted to infrequent occurrences, but functions less well as the traffic volume increases. Tables give the maximum traffic for the right hand turning lane, and vehicle spacings are simplified and reduced to a minimum of 150 M. /TRRL/

  • Corporate Authors:

    Association Argentina de Carrete Rag

    Paseo Colon
    823P70 Buenos Aires,   Argentina 
  • Authors:
    • Mellibosky, R
  • Publication Date: 1974-1-3


  • Spanish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 4
  • Serial:
    • Carreteras
    • Volume: 2
    • Issue Number: 69
    • Publisher: Asociacion Espanda de la Carretera

Subject/Index Terms

Filing Info

  • Accession Number: 00184016
  • Record Type: Publication
  • Source Agency: Central Laboratory of Bridges & Highways, France
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM