Traffic outcomes

Facts and figuresWhen each stage of WestConnex opens to traffic, travelling in Sydney will get easier.

By 2031, WestConnex will provide travel time savings of about:

  • 40 minutes between Parramatta and Sydney Airport
  • 20 minutes between Burwood and Sydney Airport
  • 30 minutes between Liverpool and south Sydney employment area
  • 30 minutes from Port Botany to Silverwater.

The cost of congestion Congested roads are slower and make travel times unpredictable. Motorists and buses take longer to reach their destination, impacting efficiency, productivity and the economy.
Congestion across Sydney costs about $6.1 billion per year. Without action, these costs are forecast to rise to $12.6 billion per year by 2030.

Building for tomorrowWestConnex will help to keep Sydney moving, both now and into the future. It will deliver the increased capacity Sydney needs to cater for a growing population and deliveries that can only be made by road including goods ordered online, supplies to businesses, and food to supermarkets

Future traffic volumes WestConnex has been designed to cater for traffic now and into the future. The forecast volumes in 2031 are in the table.

Forecast average weekday volumes on WestConnex in 2031 


Average weekday volumes in 2031 (vehicles)

Number of lanes (two-way)

Widened M4, east of James Ruse Drive



M4 East, east of Concord Road



M4–M5 Link (between Haberfield and Rozelle)



M4–M5 Link (between Rozelle and St Peters)



Existing M5 East



New M5





Improving traffic across the network 

By 2031, WestConnex will:

  • Reduce the average weekday and peak period volumes on Parramatta Road, Queens Road and Lyons Road in the Five Dock area, near the M4 East
  • Constrain traffic growth on Parramatta Road east of Wattle Street to 2012 volumes
  • Reduce traffic on City West Link (Dobroyd Parade) and Marion Street in Leichhardt
  • Reduce traffic on Southern Cross Drive by about 24,000 vehicles on an average weekday
  • Reduce traffic on the M5 East by about 60,000 vehicles on an average weekday
  • Reduce traffic on General Holmes Drive by about 15,000 vehicles on an average weekday
  • Reduce heavy vehicle volumes on King Street, Newtown by 54 per cent compared to conditions without the project
  • Reduce car numbers on King Street by 10 per cent. 

Local roadsAs each part of WestConnex is delivered, it will bring relief to residents by taking traffic off local streets. The full benefits will be realised when it is completed and opened to traffic in 2023.

Roads and Maritime Services is working to ensure WestConnex is integrated into the local road network. For each WestConnex project, a Road Network Performance Review Plan will:

  • Assess the traffic on surface roads after WestConnex is complete, including ‘rat-running’
  • Recommend any changes to ensure effective operation with the broader network.