THE CAPACITY OF SOME MAJOR/MINOR PRIORITY JUNCTIONS

The report describes traffic flow observations made at five three-way major/minor priority junctions under conditions of heavy minor road demand. The results have been analysed by linear regression methods to determine the extent of the interactions between the major and minor road streams. Variations in the composition of major road traffic had no detectable effect on the total flow through the junction; effects due to variations in minor road composition were slight only. The relationships between the major and saturated minor road traffic flows are represented by linear equations which allow the minor road approach capacities to be calculated. The results provide a framework for predicting the practical capacities of three-way junctions. An extension to the four-way case is suggested.(a) /TRRL/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • KIMBER, R M
• Publication Date: 1976

Language

• English

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 21 p.

Subject/Index Terms

• TRT Terms: Arterial highways; Bus priority; Forecasting; Highway capacity; Intersections; Linear equations; Linear regression analysis; Linear systems; Mathematical models; Secondary roads; Streets; Three leg intersections; Traffic flow; Traffic signal preemption; Vehicle mix
• Old TRIS Terms: Minor trafficway
• ITRD Terms: 643: Capacity (road, footway); 132: Forecast; 455: Junction; 6484: Linear system; 2748: Main road; 6473: Mathematical model; 648: Priority (traffic); 2773: Secondary road; 641: Traffic composition; 671: Traffic flow
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation; I72: Traffic and Transport Planning; I73: Traffic Control;

Filing Info

• Accession Number: 00157355
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: TRRL Supl Rpt LR735 Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Oct 13 1977 12:00AM