Sydney CBD and South East Light Rail
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Transcript of Sydney CBD and South East Light Rail
TitleSydney CBD and South East Light Rail
Operational Traffic Modelling – Did We Get It Right?
Overview
• Overview• Modelling Approach and Model Application• Operational Assessment – Did we get it right so far?• Lessons Learnt
Overview
• Sydney CBD faces challenges – 330,000 jobs are located in Sydney
CBD (14 percent of all Sydney jobs)– 630,000 trips are made into the city
centre on a typical weekday – Almost 25% of trips to and from the
CBD are made by private vehicles due to convenience
Pressure on Transport Network
Overview
• To respond to challenges, Sydney is undergoing major transformation with a number of significant transport infrastructure projects
WestConnex
Sydney CBD and South East Light Rail
Sydney Metro Northwest
Parramatta Light RailWestern Harbour Tunnel
Bus Network Changes
Overview
• Sydney CBD and South East Light Rail (CSELR)– Twelve kilometer route between Circular
Quay and Kingsford and Randwick– Pedestrianised zone on George Street
between Hunter and Bathurst Streets
Overview
• Sydney CBD Bus Plan – more efficient and simplified bus network
From this…. …to this
CSELR Modelling – Why model it ?
• To provide inputs for other assessments
• To assist decision making process and improve strategies
• To forecast what might happen in the future and to avoid this…..
January 2015 – Bus and Traffic Congestion on SHB due to Construction Works in the CBD
Modelling Approach
• Model Architecture and Integration
Aimsun Micro
Modelling Approach
• Study Area
CBD CordonAimsun Model Study Area
CSELR Corridor
Model Application - Forecast Validation
• George Street Construction Closures
• October 2015 - New CBD Bus Plan Introduction
Model Application – Forecast Validation
• Typical Sydney CBD Cordon Traffic Profile
– Over a number of years, the morning peak has had 20-25,000 inbound vehicle trips
Forecast Validation – Did we get it right?• This is what happened on the day
Despite the George Street closures, overall vehicle numbers (inbound and outbound) were comparable to a typical weekday.
Forecast Validation – Did we get it right?• This is what the model showed
Outbound AM PeakInbound AM Peak• Accurate
replication of inbound volumes (within 2%) and patterns
• Outbound volumes lower by 16%
Forecast Validation – Did we get it right?• Congestion hot spots identified by the modelAM Peak PM Peak
• Clarence St/Margaret St/York St in the AM Peak
• Hay St/Pitt St and Hay St/Castlereagh St in the PM
Forecast Validation – Did we get it right?• Congestion hot spots in reality
The worst intersections as reported by the Sydney Morning Herald…………and the public
Operational Assessment – Did we get it right?
• Redirection of traffic to other alternative north-south routes, mainly College St, Elizabeth St and Sussex St
• Reduction in volumes on some east-west corridors, mainly Bridge St, Bathurst St, Liverpool St
• This is what the model showed – AM Peak
Operational Assessment – Did we get it right?
• This is what happened on the day – AM Peak
• Increase in volumes along College St (both directions) as well as Macquarie St
• Reduction in volumes on York St• Increase in volumes on Castlereagh St• Some reduction in number of east-west
trips along Bathurst St and Liverpool St• Reduction in traffic volumes along
Grosvenor St and Bridge St eastbound• Increase in volumes on Elizabeth Street
(northbound)
Lessons Learnt
• The model has become an extremely useful tool to supported different stages of the project but it cannot substitute common sense.
• It has become very complex. • Changeable traffic arrangements and travel
patterns makes the development of an accurate ‘base model’ almost impossible.
Thank You