ON THE RESERVE CAPACITIES OF PRIORITY JUNCTIONS AND ROUNDABOUTS

S C. Wong

Document Type

Journal Article

Publication Date

1996

Subject Area

operations - traffic, infrastructure - bus/tram priority, infrastructure - bus/tram priority, infrastructure - traffic signals, mode - bus

Keywords

Traffic signal priority systems, Traffic signal preemption, Signalized intersections, Signalised intersections, Roundabouts, Resources, Preemption (Traffic signals), Natural resources, Modern roundabouts, Junctions (Traffic), Junctions, Intersections, Fuel resources, Energy resources, Energy reserves, Earth resources, Cross roads, Bus priority

Abstract

The concept of reserve capacity of a whole junction has been used extensively in the design of signal-controlled junctions. This concept, however, has not been applied to priority junctions and roundabouts, probably because of the complicated demand and supply relationship. When the demands on the approaches to the junction increase, the capacities of those non-priority approaches reduce at different rates. This makes the calculation of reserve capacity of the whole junction not a straightforward task. Using the definition of reserve capacity of a whole junction in Allsop, explicit formulae for the estimation of reserve capacities of priority junctions and roundabouts are derived in this paper.

Comments

Transportation Research Part B Home Page: http://www.sciencedirect.com/science/journal/01912615

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