Li, S;
(2016)
Modelling and management of multi-modal urban traffic.
Doctoral thesis , UCL (University College London).
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Abstract
This research aims to model and manage bus regularity with consideration of the interaction between buses and surrounding traffic in an integrated multi-modal system. A parsimonious macroscopic simulation framework is first developed to estimate multi-modal road traffic conditions and the bus-traffic interaction based on the variational formulation of kinematic waves. The proposed simulation platform can capture shocks, dispersion of vehicle platoons, moving bottlenecks and traffic characteristics effectively with data collected from Central London. Second, different bus holding strategies are implemented on the proposed simulation platform in order to evaluate and compare their performance on improving bus service regularity and impact on transport system efficiency. It is shown that the two-way holding strategy performs the best in terms of regulating headway at low-traffic level. At high-traffic level, the two-way holding strategy and the forward holding strategy have a similar performance. However, the efficiency of buses and road traffic can be severely compromised due to bus holding at stops and the consequential delay on road traffic, especially under heavy traffic conditions. In order to mitigate these challenges, the third part of this thesis presents a range of signal-based bus holding strategies which are responsive to road traffic dynamics. Proposed control strategies are implemented on the proposed simulation platform to evaluate their performance. They are also compared with traditional stop-based holding strategies and numerical results suggest improved bus service regularity and transport efficiency.
| Type: | Thesis (Doctoral) |
|---|---|
| Title: | Modelling and management of multi-modal urban traffic |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Third party copyright material has been removed from ethesis. |
| Keywords: | multi-modal traffic, urban transport, traffic flow theory, modelling and simulation, infrastructure |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1475181 |
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