Aerial view of M4 motorway

M4 Smart Motorway project

The NSW Government is investing $600 million to build the M4 Smart Motorway project, which will introduce intelligent technology to the M4 Motorway between Pitt Street, Parramatta and Mulgoa Road, Penrith.

Latest news

APR 2021

APR 2021Gantry installations

The M4 Motorway will be closed for one night from 11pm, Monday 19 April to 4am Tuesday 20 April to install four final gantries. The motorway will be closed between The Northern Road and Mamre Road, with detours in place. See the April 2021 gantry install notification (PDF, 431Kb) for more details.

DEC 2020

DEC 2020Sydney's first smart motorway given the green light

The state’s first smart motorway has been permanently switched on after a trial in which the intelligent technology provided motorists with a smoother and more reliable journey.

View the media release for more information.


To assist with the flow of traffic on the motorway, ramp meters have been installed on entry ramps for the M4 Motorway. This installation has meant that traffic flows consistently onto the motorway reducing the gaps for cyclists to cross over. For the safety of cyclists they should continue to use the alternative route that has been in place since 2017 for travel between Penrith and Parramatta, as their permanent route to the M4. For more information about where this route is located please see the map.

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Media releases

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14 December 2020

Sydney's first smart motorway given the green light

23 November 2020

All systems go for State's first smart motorway



Contact us

If you have any questions or concerns about the project, please contact us by:

Phone: 1800 989 929


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