Posts tagged demand responisve transit

Passenger Route Choice and Assignment Model for Combined Fixed and Flexible Public Transport Systems

The recent technological innovations have given rise to innovative mobility solutions. Public transport systems combining such services need novel models for the design of services. We develop a multimodal route choice and assignment model for combined use of line/schedule based public transport systems (fixed public transport) and demand responsive services (flexible public transport). The model takes into account the dynamic demand-supply interaction using an iterative learning model framework. Flexible public transport can be used to perform any part of the trip, ranging from a first/last mile service to an exclusive direct door-to-door connection. The developed model is implemented in an agent based simulation framework. The model is applied to the test network of Sioux Falls. Results, in terms of modal split, fleet utilization, and passenger waiting times are analysed for scenarios in which fixed and flexible public transport are offered as competing modes as well as potential complementing modes.

Find the CASPT presentation HERE

Van B naar Anders

Op woensdag 30 mei organiseerde de Rli naar aanleiding van zijn advies een symposium. Tijdens dit symposium is het advies toegelicht en met betrokkenen uit de mobiliteitswereld besproken. Daarbij wordt stilgestaan bij de toekomst van mobiliteit en infrastructuur, de bestuurlijke praktijk en bij innovatie en verduurzaming van ons mobiliteitssysteem.

Vind alle bijdragen en verslag HIER

De presentatie over de toekomst van mobiliteit van Niels van Oort vind je HIER

The Potential of Demand Responsive Transport as a Complement to Public Transport

Demand Responsive Transport (DRT) offers a collective flexible travel alternative that can potentially complement Fixed Transit (FT). The combination of an on-demand and line-based services holds the promise of improved mobility and increased service coverage. However, insofar it remains unknown whether DRT services deliver such much anticipated improvements.

This study presents an assessment framework to evaluate the performance of DRT and related changes in accessibility and performs an empirical analysis for a recently introduced DRT service in the Netherlands. The framework includes a performance benchmark between DRT and FT based on the computation of generalized journey times of the DRT rides and the FT alternatives, and it can help identify whether DRT is used as complement or substitute of FT.
The framework covers the spatial and temporal dimensions, and the explicit consideration of rejected trips is an integral part of the evaluation. Results suggest large accessibility improvements for DRT users, especially for some underserved origin-destination pairs.

Read more of this work of Maria J. Alonso Gonzalez: TRB Paper and TRB Presentation

Performance assessment of fixed and flexible public transport in a multi agent simulation framework

The emergence of innovative mobility solutions that offer flexible transport services, is changing the way urban public transport systems will be designed. Such mobility solutions offer on demand transport services and hence can solve the problems inherent with traditional line based and schedule based public transport systems. It is essential to understand the dynamics of this new demand-supply market with co-existing and competing fixed and flexible public transport. However, the performance of the system comprising of users and transit services and the factors influencing them, have received limited attention in literature. In this paper a model is developed to analyse the system performance when the modes of fixed public transport and flexible public transport operate in competition. The model is implemented in the multi-agent simulation framework MATSim with dynamic assignment in which the users optimize their travel plan through iterative learning from the service experienced and altering their travel plan. The scenarios in which the flexible public transport offer private and shared services are considered. The system performance is analysed for varying fleet size of flexible public transport and ratio of cost of flexible to fixed public transport.

Find the paper HERE

Urban Demand Responsive Transport in the Mobility as a Service ecosystem: its role and potential market share

Mobility as a Service (MaaS) is entering the transportation market. MaaS aims at the full
integration of the existing transportation services and it offers tailored mobility packages to
the user. In MaaS ecosystems, on-demand services play an important role as complement to
public transport due to their flexibility. However, to date, most attention has been placed on
individual on-demand services. This study focuses on Demand Responsive Transport (DRT):
collective on-demand services. Using an on-line survey, we analysed the characteristics of
the respondents who chose different modes of transport among their selected modes.
Results find a distinctive pattern in the willingness of users to use different modes, with
different levels in what could be considered as a multimodality ladder. The different rungs of
it would be: 1st car (if available), 2nd public transport, 3rd DRT and 4th taxi-like services.
This way, a person standing on the third rung would include car, public transport and DRT in
their consideration set, but not taxi. This finding suggests that, if implemented in the right
way, DRT services can attract a larger number of users than taxi-like services, especially in a
MaaS ecosystem where initial barriers to try this service can be lessened.

Find the paper presented by Maria Alonso Gonzalez at the Thredbo conference in Stockholm HERE

© 2011 TU Delft