The M4 is a 40 kilometre freeway, running from Concord in the inner-west to Penrith and Lapstone at the foot of the Blue Mountains. There are 16 interchanges along the M4, including a connection to the M7 at the Lighthorse Interchange at Eastern Creek. The M4 enables safe and efficient travel between key regions of western Sydney and services over 100,000 commuters, local residents and businesses each day

M4 corridor

Updates and announcements

The NSW Government announced in October 2012 that it would proceed with Infrastructure NSW's recommendation to deliver a motorway scheme for Sydney.

WestConnex is a 33 kilometre motorway proposal which would link Sydney's west with the airport and the Port Botany precinct.

Find out more about WestConnex and what this means for the M4.

Project background

Construction of the M4 was initiated in response to the need to provide an efficient link through Sydney's western suburbs and between western Sydney and the inner-west. The motorway was designed to provide a direct link between key regions in western Sydney, reduce travel times between these regions, and provide a gateway to western Sydney.

On 16 February 2010, operation of the M4 Motorway was handed back to the NSW Government and the toll was removed.


  • Quicker journey times. The M4 provides a faster trip than alternative routes over its entire length, including travel during peak traffic periods
  • Improved traffic flow. The M4 bypasses 40 kilometres of intersections and 60 sets of traffic lights
  • Improved commute times for residents working in the inner-west and Central Sydney areas
  • Access for cyclists along the shoulder of the M4, except on the section between Silverwater Road, Auburn and Church Street, Parramatta.

Key features

  • Most of the M4 has three lanes in each direction
  • Sixteen major interchanges, including a connection to the M7
  • Posted travel speeds range from 90km/h to 110km/h.
Share this page: