Bus priority using pre-signals

Wu, Jianping and Hounsell, Nick (1998) Bus priority using pre-signals Transportation Research. Part A: Policy and Practice, 32, (8), pp. 563-583. (doi:10.1016/S0965-8564(98)00008-1).


Full text not available from this repository.


The need to provide efficient public transport services in urban areas has led to the implementation of bus priority measures in many congested cities. Much interest has recently centred on priority at signal controlled junctions, including the concept of pre-signals, where traffic signals are installed at or near the end of a with-flow bus lane to provide buses with priority access to the downstream junction. Although a number of pre-signals have now been installed in the U.K., particularly in London, there has been very little published research into their design, operation and optimisation. This paper addresses these points through the development of analytical procedures which allow pre-implementation evaluation of specific categories of pre-signals. The paper initially sets out three categories of pre-signal, which have different operating characteristics, different requirements for signalling and different impacts on capacity and delay. Key issues concerning signalling arrangements for these categories are then discussed, together with a summary of the analytical approach adopted and the assumptions required. Equations are developed to allow appropriate signal timings to be calculated for pre-signalised intersections. Further equations are then developed to enable delays to priority and non-priority traffic, with and without pre-signals, to be estimated with delay being taken here as the key performance criterion. The paper concludes with three application examples illustrating how the equations are applied and the impacts of pre-signals in different situations.The analyses confirm the potential benefits of pre-signals, where these signals apply to non-priority traffic only. Where buses are also subject to a pre-signal, it is

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/S0965-8564(98)00008-1
ISSNs: 0965-8564 (print)
Keywords: pre-signal, queue relocation, bus priority, public transport, traffic management

ePrint ID: 75117
Date :
Date Event
November 1998Published
Date Deposited: 11 Mar 2010
Last Modified: 18 Apr 2017 20:44
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/75117

Actions (login required)

View Item View Item