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.
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.
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
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.
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.