Title

New Methodology for Optimizing Transit Priority at the Network Level

Document Type

Journal Article

Publication Date

2008

Subject Area

infrastructure - bus/tram priority, infrastructure - bus/tram priority, infrastructure - bus/tram lane, infrastructure - bus/tram lane, land use - planning, ridership - commuting, mode - bus

Keywords

Travel time, Optimization, Optimisation, Network level planning, Methodology, Methodologies, Lane assignment, Journey time, Bus priority, Bus lanes, Bilevel programming

Abstract

A new methodology for optimizing transit road space priority at the network level is proposed. Transit vehicles carry large numbers of passengers within congested road space efficiently. This aids justification of transit priority. Almost all studies that have investigated transit priority lanes focus at a link or an arterial road level, and no study has investigated road space allocation for priority from a network perspective. The aim of the proposed approach is to find the optimum combination of exclusive lanes in an existing operational transport network. Mode share is assumed variable, and an assignment is performed for both private and transit traffic. The problem is formulated by using bilevel programming, which minimizes the total travel time. The approach is applied to an example network and the results are discussed. The approach can identify the optimal combination of transit priority lanes and achieve the global optimum of the objective function. Areas for further development are discussed.