PERMANENT LANE DROPS ON MOTORWAYS

PERMANENTE RIJSTROOKVERMINDERING IN AUTOSNELWEGEN

Geometric congestion in motorway sections begins mainly on road sections where traffic streams diverge or converge. In this report the lane drop effects on the traffic stream have been investigated. Eight different types of lane drops have been investigated. These eight are: outlying taper drop, ending of climbing lane, ending of overtaking lane, two lane entrance ramp, two lane exit ramp, exit ramp with lane drop, major diversion, and weaving section. The problems of lane drops contain traffic operational, behavioural, psychological and road safety elements. In this report the traffic operational aspects are mainly studied. Before measurements have been carried out, three hypotheses have been made about the cluster capacity in the area of influence of a lane drop: (1) cluster capacity proportional to the number of lanes; (2) capacity funnel; and (3) situations when the cluster capacity decreases below the cluster capacity of two lanes. In a second part of the report addenda are presented.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09200592
• Corporate Authors:

  Delft University of Technology

  Stevinweg 1
  Delft,   Netherlands  2600 GA
• Authors:
  • Borsje, J F
  • WESTLAND, D
• Publication Date: 1989-1

Language

• Dutch

Media Info

• Features: References;
• Pagination: 68 p.
• Serial:
  • Publication of: Delft University of Technology
  • Publisher: Delft University of Technology
  • ISSN: 0920-0592

Subject/Index Terms

• TRT Terms: Access roads; Climbing lanes; Forecasting; Freeways; Highway capacity; Highway design; Numbers; Passing; Street closure; Traffic congestion; Traffic diversion; Traffic lanes
• Uncontrolled Terms: Decreases; Modifications; Transverse profile
• ITRD Terms: 435: Access road; 643: Capacity (road, footway); 2808: Climbing lane; 632: Congestion (traffic); 9009: Decrease; 628: Diversion (traffic); 132: Forecast; 2855: Highway design; 9048: Modification; 2752: Motorway; 6432: Number; 1822: Overtaking; 637: Road closure; 2827: Traffic lane; 2843: Transverse profile
• Subject Areas: Design; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00491577
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Report/Paper Numbers: VK-2201.301
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM