Speed-flow models for Singapore downtown ring roads

As Singapore continues to tackle the problem of limited land space with a rising population, there is a rising concern about the transport capacities and transport infrastructure to keep up with the expected increase in population. The government has implemented policies such as the Electronic Road...

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Main Author: Lim, Elton Chee Yuan
Other Authors: Wong Yiik Diew
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
Subjects:
Online Access:https://hdl.handle.net/10356/141094
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1410942020-06-04T02:10:30Z Speed-flow models for Singapore downtown ring roads Lim, Elton Chee Yuan Wong Yiik Diew School of Civil and Environmental Engineering CYDWONG@ntu.edu.sg Engineering::Civil engineering As Singapore continues to tackle the problem of limited land space with a rising population, there is a rising concern about the transport capacities and transport infrastructure to keep up with the expected increase in population. The government has implemented policies such as the Electronic Road Pricing (ERP) system to tackle these issues. For the next generation distance-based pricing ERP system to be implemented effectively in Singapore, a set of current and relevant speed flow models is required. Existing speed-flow models were conducted many years ago and might not well reflect the updated vehicle speed limit and current driver’s behaviour. The main focus of this study is therefore to update the set of speed-flow models for downtown ring roads and to identify the factors affecting the speed-flow curves. Video-recording technique was used to collect traffic speed and traffic volume data from Scotts Road and Balestier Road. Traffic composition analysis and lane width analysis were done to better understand the characteristics of the traffic data collected. Passenger Car Equivalency (PCE) values from previous studies were used to convert the vehicles into equal passenger car units (PCUs). The collected data were fitted into several single and multi-regime speed-flow models and a regression analysis was conducted for individual lanes. After comparing the coefficients of determination (R2) value, the Generalised Drake model was determined to provide the best fit for the data points collected. Comparison between models for Scotts Road and Balestier Road was done and several factors such as number of lanes and lane width were identified to affect the speed-flow model for downtown ring roads. A further study on the speed-flow models for adverse weather conditions was recommended to further account for adjustment factors. The impact of motorcycles on the speed-flow model can also be investigated in further studies due to the tendency of motorcycles to travel in-between lanes. Bachelor of Engineering (Civil) 2020-06-04T02:10:30Z 2020-06-04T02:10:30Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/141094 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Civil engineering
spellingShingle Engineering::Civil engineering
Lim, Elton Chee Yuan
Speed-flow models for Singapore downtown ring roads
description As Singapore continues to tackle the problem of limited land space with a rising population, there is a rising concern about the transport capacities and transport infrastructure to keep up with the expected increase in population. The government has implemented policies such as the Electronic Road Pricing (ERP) system to tackle these issues. For the next generation distance-based pricing ERP system to be implemented effectively in Singapore, a set of current and relevant speed flow models is required. Existing speed-flow models were conducted many years ago and might not well reflect the updated vehicle speed limit and current driver’s behaviour. The main focus of this study is therefore to update the set of speed-flow models for downtown ring roads and to identify the factors affecting the speed-flow curves. Video-recording technique was used to collect traffic speed and traffic volume data from Scotts Road and Balestier Road. Traffic composition analysis and lane width analysis were done to better understand the characteristics of the traffic data collected. Passenger Car Equivalency (PCE) values from previous studies were used to convert the vehicles into equal passenger car units (PCUs). The collected data were fitted into several single and multi-regime speed-flow models and a regression analysis was conducted for individual lanes. After comparing the coefficients of determination (R2) value, the Generalised Drake model was determined to provide the best fit for the data points collected. Comparison between models for Scotts Road and Balestier Road was done and several factors such as number of lanes and lane width were identified to affect the speed-flow model for downtown ring roads. A further study on the speed-flow models for adverse weather conditions was recommended to further account for adjustment factors. The impact of motorcycles on the speed-flow model can also be investigated in further studies due to the tendency of motorcycles to travel in-between lanes.
author2 Wong Yiik Diew
author_facet Wong Yiik Diew
Lim, Elton Chee Yuan
format Final Year Project
author Lim, Elton Chee Yuan
author_sort Lim, Elton Chee Yuan
title Speed-flow models for Singapore downtown ring roads
title_short Speed-flow models for Singapore downtown ring roads
title_full Speed-flow models for Singapore downtown ring roads
title_fullStr Speed-flow models for Singapore downtown ring roads
title_full_unstemmed Speed-flow models for Singapore downtown ring roads
title_sort speed-flow models for singapore downtown ring roads
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/141094
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