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Pacific Motorway Upgrade: M1/M3/Gateway merge


The Pacific Motorway southbound in the vicinity of the Gateway Motorway merge at Eight Mile Plains is currently experiencing high levels of congestion. It is operating over capacity during the afternoon peak resulting in significant delays and unreliable travel times. 


Eight Mile Plains to Rochedale.


Improved traffic flows, safety and reduced travel times.


Lendlease Engineering Pty. Ltd.


The M1/M3/Gateway merge project is estimated to cost $170 million.

South Coast Region

Project info

The upgrade of the southbound section of the Pacific Motorway M1/M3/Gateway merge will improve these congestion issues.
The upgrade includes:

  • up to 5 southbound lanes on the Pacific Motorway between Eight Mile Plains and Rochedale South (Exit 19)
  • the relocation of the existing bus entry from the Eight Mile Plains Bus Station onto the Pacific Motorway
  • replacement of the Underwood Road bridge to a new 4 lane overpass
  • managed motorway technologies from Klumpp Road to Rochedale Road.

This project is part of the Pacific Motorway Upgrade Master Plan being delivered in priority stages as funding becomes available.

Key milestones

  • Late 2017: Contract awarded/design
  • Early 2018: Construction commenced in April 2018
  • Early 2020: Project completion. 

Contact details

Phone: 1800 571 816
Fax: 07 5563 6611

Community info

Further information will be released to the wider community when detailed design for the upgrade is complete.

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Last updated
18 May 2018