The West Gate Tunnel’s twin tunnels in Melbourne are approximately 4 kilometres long westbound and 2.8 kilometres long eastbound, forming part of an 8 kilometre freeway-standard toll road.

Quick Scoop

  • The overall West Gate Tunnel road is about 8 km long, linking the West Gate Freeway at Yarraville to CityLink and the Port of Melbourne.
  • Within that, there are twin tunnels under Yarraville: the westbound (outbound) tunnel is around 4 km, and the eastbound (inbound) tunnel is around 2.8 km.
  • The rest of the route is made up of a new bridge over the Maribyrnong River and an elevated section above Footscray Road.

Tunnel length breakdown (HTML table)

Section Approx. length Direction
Westbound tunnel 4 km Outbound from city
Eastbound tunnel 2.8 km Inbound to city
Whole toll road (tunnel + bridge + elevated) 8 km Both directions

In everyday use, when people ask “how long is the West Gate Tunnel?”, they usually mean the main westbound bore , which is about 4 kilometres long, but the full twin-tunnel section is roughly 6.8 kilometres combined.

TL;DR:

  • Westbound tunnel: ~4 km
  • Eastbound tunnel: ~2.8 km
  • Whole West Gate Tunnel road: ~8 km.

Information gathered from public forums or data available on the internet and portrayed here.