MULTI-MODAL AND DEMAND-RESPONSIVE PASSENGER TRANSPORT SYSTEMS: A MODELLING FRAMEWORK WITH EMBEDDED CONTROL SYSTEMS

MET Horn

Document Type

Journal Article

Publication Date

2002

Subject Area

operations - scheduling, planning - service quality, planning - signage/information, land use - planning, ridership - mode choice, ridership - modelling, ridership - commuting, ridership - demand, mode - bus, mode - mass transit, mode - taxi, mode - paratransit

Keywords

Travel models (Travel demand), Travel demand, Transit, Taxicabs, Simulation, Service quality, Scheduling, Routing, Reservations, Real time data processing, Quality of service, Public transit, Passenger transportation, Passenger service quality, Paratransit services, Multimodal transportation, Multimodal systems, Motor coaches, Mode choice, Modal choice, Mass transit, Local transit, LITRES-2, Dial a ride, Demand responsive transportation, Contingency planning, Computer simulation, Choice of transportation, Cabs (Taxicabs), Buses, ATIS, Advanced traveler information systems

Abstract

This paper describes a modeling system called LITRES-2, which is designed to help transportation planners and operators investigate the performance of public transport systems, especially for demand-responsive transport modes and traveler information technologies. Conventional timetabled services such as buses and trains are modeled along with taxis (both single- and multiple-hired) and other demand-responsive services. From pre-defined specifications of aggregate demand, the system produces a stream of fully-articulated, time-ordered travel requests. Individual requests are resolved as single- or multiple-leg journeys, through the use of request-broking and journey-planning modules that seek to minimize travelers' generalized costs. Journey-legs allocated to demand-responsive modes are handled by a fleet-scheduling module which includes provisions for instantaneous and advance bookings as well as for contingent situations such as breakdowns and passenger no-shows. The fleet-scheduling and journey-planning modules are designed as embedded control systems and are intended for use in real-time as well as modeling applications. Recent planning studies using LITRES-2 show that the system can achieve a convincing level of credibility in representing base-case passenger-transport conditions and speculative planning proposals. LITRES-2 appears to be most useful in modeling situations where the critical issues are concerned with the deployment and performance of passenger transport systems.

Comments

Transportation Research Part A Home Page: http://www.sciencedirect.com/science/journal/09658564

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