Simulating advanced bus priority strategies at traffic signals
Simulating advanced bus priority strategies at traffic signals
The literature review showed that there is a need for a model for modelling differential priority in detail. Hence, a microscopic simulation model SIMBOL (Simulation Model for Bus priority at traffic signal) was developed. SIMBOL simulates a bus route in a field situation, taking account of the characteristics of buses, bus stops, traffic signals, the AVL system and differential bus priority systems.
The model was calibrated and validated with the field data from a bus route in Southampton. The validated model was then used to formulate 7 different types of priority strategies and to simulate them under various scenarios. These strategies varied in terms of the level of priority to be provided, based on the lateness of the buses. The different scenarios in which these strategies were simulated included: the present field condition, different types of bus generation, holding early buses, potential errors in location systems and changes in bus operations. The performance of these priority strategies was evaluated using the output results from the model.
The simulation results showed that all bus priority strategies simulated give benefit to a bus system including buses and passengers. However, the type of benefits and their magnitude differ from one strategy to another. The results illustrated the strength and weaknesses of different priority strategies under different field conditions. This showed that the selection of a best-suited priority strategy depends upon the aim of a priority scheme in terms of total benefit or punctuality. Research included the development, modelling and recommendation of a new mixed priority strategy giving good benefits across a range of scenarios. The research also demonstrated the usefulness of SIMBOL as a valuable tool for modelling differential bus priority under different field conditions and as a basis for further research.
University of Southampton
Shrestha, Birendra Prasad
68edd354-cb4d-4bd9-b95d-64da4171c37d
2003
Shrestha, Birendra Prasad
68edd354-cb4d-4bd9-b95d-64da4171c37d
Shrestha, Birendra Prasad
(2003)
Simulating advanced bus priority strategies at traffic signals.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The literature review showed that there is a need for a model for modelling differential priority in detail. Hence, a microscopic simulation model SIMBOL (Simulation Model for Bus priority at traffic signal) was developed. SIMBOL simulates a bus route in a field situation, taking account of the characteristics of buses, bus stops, traffic signals, the AVL system and differential bus priority systems.
The model was calibrated and validated with the field data from a bus route in Southampton. The validated model was then used to formulate 7 different types of priority strategies and to simulate them under various scenarios. These strategies varied in terms of the level of priority to be provided, based on the lateness of the buses. The different scenarios in which these strategies were simulated included: the present field condition, different types of bus generation, holding early buses, potential errors in location systems and changes in bus operations. The performance of these priority strategies was evaluated using the output results from the model.
The simulation results showed that all bus priority strategies simulated give benefit to a bus system including buses and passengers. However, the type of benefits and their magnitude differ from one strategy to another. The results illustrated the strength and weaknesses of different priority strategies under different field conditions. This showed that the selection of a best-suited priority strategy depends upon the aim of a priority scheme in terms of total benefit or punctuality. Research included the development, modelling and recommendation of a new mixed priority strategy giving good benefits across a range of scenarios. The research also demonstrated the usefulness of SIMBOL as a valuable tool for modelling differential bus priority under different field conditions and as a basis for further research.
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Published date: 2003
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Local EPrints ID: 464936
URI: http://eprints.soton.ac.uk/id/eprint/464936
PURE UUID: 46037791-6039-4eb3-97f4-e7b7f1953c59
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Date deposited: 05 Jul 2022 00:12
Last modified: 16 Mar 2024 19:50
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Author:
Birendra Prasad Shrestha
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