Roe Highway Duplication


Customer: Main Roads Western Australia

Contract: Construct Only

Location: Welshpool, Western Australia


Transport Solutions Australia


Fast Facts

  • 2 km highway duplication
  • New bridge constructed over rail freight line
  • Modifications to existing road bridge

This project for Main Roads Western Australian involved a 2 km duplication of Roe Highway from Tonkin Highway to Orrong Road.  The works were constructed as part of the Gateway WA Project.

McConnell Dowell's scope of works included earthworks, roadworks, a new bridge over the freight railway, modifications to an existing road bridge, minor structures including noise walls, traffic management, and miscellaneous works such as landscaping.

Key construction achievements included:

Rail occupation management – required detailed planning with PTA and Arc Infrastructure, with the MCD project team meeting weekly over several months prior to the two occupations. The occupations were delivered over consecutive weekends and returned to the operator as scheduled, without safety incident or impact to rail services.

Road closures – collaboration with Main Roads allowed the project team to identify closure dates with the least impact. The planned closures occurred over two weekends and were re-opened as scheduled.

Traffic Staging – the scope included the duplication of the highway in both directions, as well as the refurbishment of the existing road. Traffic staging was complex and required detailed planning with Main Roads and traffic management consultants, successfully accommodating the requirement to maintain 80km/hr traffic flows in both directions during construction. Construction staging focused on the offline construction of the new road and bridge works to allow the traffic switch to the new infrastructure while the existing road was safely refurbished.

The project was completed to budget, as scheduled, and without significant community complaint.