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Title
Sydney 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?
• Le...
Overview
• Sydney CBD faces challenges
– 330,000 jobs are located in Sydney CBD
(14 percent of all Sydney jobs)
– 630,000 ...
Overview
• To respond to challenges, Sydney is undergoing major
transformation with a number of significant transport
infr...
Overview
• Sydney CBD and South East Light Rail
(CSELR)
– Twelve kilometer route between Circular Quay
and Kingsford and R...
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...
Modelling Approach
• Model Architecture and Integration
Aimsun Micro
Modelling Approach
• Study Area
CBD Cordon
Aimsun Model Study Area
CSELR Corridor
Model Application - Forecast Validation
• George Street Construction
Closures
• October 2015 - New CBD Bus
Plan Introducti...
Model Application – Forecast Validation
• Typical Sydney CBD Cordon Traffic Profile
– Over a number of years, the morning ...
Forecast Validation – Did we get it right?
• This is what happened on the day
Despite the George Street closures, overall ...
Forecast Validation – Did we get it right?
• This is what the model showed
Outbound AM PeakInbound AM Peak
• Accurate
repl...
Forecast Validation – Did we get it right?
• Congestion hot spots identified by the model
AM Peak PM Peak
• Clarence St/Ma...
Forecast Validation – Did we get it right?
• Congestion hot spots in reality
The worst intersections as reported by the Sy...
Operational Assessment – Did we get it right?
• Redirection of traffic to other alternative
north-south routes, mainly Col...
Operational Assessment – Did we get it right?
• This is what happened on the day – AM Peak
• Increase in volumes along Col...
Lessons Learnt
• The model has become an extremely useful tool to
supported different stages of the project but it
cannot ...
Thank You
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Sydney CBD and South East Light Rail

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Sydney CBD and South East Light Rail

  1. 1. Title Sydney CBD and South East Light Rail Operational Traffic Modelling – Did We Get It Right?
  2. 2. Overview • Overview • Modelling Approach and Model Application • Operational Assessment – Did we get it right so far? • Lessons Learnt
  3. 3. 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
  4. 4. 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 Rail Western Harbour Tunnel Bus Network Changes
  5. 5. 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
  6. 6. Overview • Sydney CBD Bus Plan – more efficient and simplified bus network From this…. …to this
  7. 7. 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
  8. 8. Modelling Approach • Model Architecture and Integration Aimsun Micro
  9. 9. Modelling Approach • Study Area CBD Cordon Aimsun Model Study Area CSELR Corridor
  10. 10. Model Application - Forecast Validation • George Street Construction Closures • October 2015 - New CBD Bus Plan Introduction
  11. 11. 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
  12. 12. 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.
  13. 13. 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%
  14. 14. Forecast Validation – Did we get it right? • Congestion hot spots identified by the model AM 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
  15. 15. 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
  16. 16. 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
  17. 17. 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)
  18. 18. 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.
  19. 19. Thank You

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