THE EFFECT OF PLATOONING ON THE CAPACITY OF PRIORITY CONTROLLED INTERSECTIONS

The capacity of a priority controlled intersection depends on the availability of acceptable gaps in the conflicting traffic stream Current methods of predicting capacity are often based on the assumption that conflicting vehicles arrive randomly, or at best allow for a minimum headway. Due to restricted overtaking opportunities, as well as the impact of traffic signals, platoons formed in the traffic stream. Headways in the traffic stream can therefore be categorised into large inter-platoon gaps and a concentration of vehicles in closely spaced platoons. Current methods therefore seriously underestimate the number of acceptabl gaps when such platooning occurs. The effect of platooning on capacity is nearly as important as the effect of the opposing tra volume itself. Possible errors are of sufficient significance to warrant the inclusion of the effect of platooning in capacity calculations. A relatively simple modification to Tanner's capac model is proposed to account for this phenomenon. Consideration should be given to this aspect for possible future inclusion in the Highway Capacity Manual. (a)

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 315-24

Subject/Index Terms

Filing Info

  • Accession Number: 00674564
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0-86910-64
  • Files: ITRD, , ATRI
  • Created Date: Mar 8 1995 12:00AM