Widened M4 traffic volume data

Roads and Maritime Services publishes traffic volumes and travel speeds across the road network to inform customer journeys and keep motorists informed.

On 16 July, 2017 the NSW Government completed a widening project of the existing M4 Motorway from Parramatta to Homebush to increase capacity on this section from three to four lanes in each direction. The 7.5km widened section forms the first part of the $16.8 billion WestConnex project, which will connect to underground twin motorway tunnels from Homebush to Haberfield featuring three lanes in each direction, set to open in 2019.

Daily traffic volumes on the widened section of the M4 are made available from 1 July 2017 to inform motorist journeys. This information will be updated on a monthly basis.


In 2009, Average Daily Traffic volumes ('ADT') on the section of the M4 motorway between James Ruse Drive and Silverwater Road were around 109,000.

Total traffic on the pre-widened section of motorway between Parramatta and Homebush reached around 180,000 in June 2017. This section of the New M4 was widened from 3 to 4 lanes in each direction and officially opened to traffic on 16 July 2017, with a 1 month toll free period. ADT volumes reached their highest point during the toll free period, before moderating following the introduction of the new toll on 15 August 2017.

Volumes on the widened section of the motorway were originally forecast to reach 163,000 by 2031.

Map showing the location of the widened M4, between Parramatta and Homebush

New M4 traffic volume data

Important information

  • Traffic data relating to the widened section of the M4 Motorway between Parramatta and Homebush is provided by Roads and Maritime Services for the purpose of disseminating information to the public.
  • Figures presented are based on roadside passage data collected from tolling infrastructure on the widened section of the M4 Motorway.
  • Total vehicle trips include all heavy and light vehicle trips taken on the widened section of the M4 Motorway from any entry or exit point in both directions.
  • Traffic data is subject to variation due to a range of occurrences including, but not limited to, traffic incidents, major events, required closures, holiday periods, inclement weather or technical issues with roadside infrastructure.
  • The data is provided for information purposes only.

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