The 8.5 kilometre extension of Roe Highway from Welshpool Road to Nicholson Road delivered a section of four-lane freeway style highway in Perth's south eastern metropolitan area to enhance transport efficiencies and infrastructure.
Roe Highway takes its name from former surveyor general of Western Australia, John Septimus Roe and is an important traffic link between Perth's southern, northern and eastern suburbs.
GHD Pty Ltd undertook all engineering design and documentation for the project.
Main Roads Western Australia awarded Leighton Contractors a $62 million contract to design and construct the section of highway from Welshpool Road to Nicholson Road in May 2001. This contract provided for completion of the highway to the Kenwick Link by 20 December 2002 and to Nicholson Road by late 2003.
This project included designing and constructing three grade-separated interchanges at highway access points and carrying other roads over Roe Highway.
Other project works included extending the regionally important Orrong Road as a four-lane dual carriageway to connect Roe Highway with the Welshpool and Kewdale industrial areas. As part of these works, William Street, which had been taking traffic from Roe Highway for more than seven years, was disconnected from Roe Highway and connected to Welshpool Road.
Other principal components of the project included constructing a shared use footbridge over Roe Highway and twin bridges across the Canning River.
The project encompasses an area of high conservation value including a nationally recognised wetland and a river, which were protected through strict environmental restrictions.
The design and construction of Roe Highway Stages 4/5 is a fine example of how excellence in engineering design and construction can provide measurable benefits to project stakeholders, the community and road users, while protecting and enhancing its surrounding environment.
A project of this size has many aspects of engineering excellence, however, the principle elements of this project include:
The Roe Highway Stages 4 & 5 project provided better than normal project results due to the unique partnering approach that developed between Main Roads, Leighton Contractors and GHD, was well as other project stakeholders. This approach included all stakeholders embracing a shared commitment to achieve excellent results measured against the project's objectives.
The project was also delivered within Main Roads budget and before schedule. The project team's 'no compromises approach' toward environmental, community and safety objectives is a testimonial in itself to the excellence of the project.
The amount of civil and structural work to be undertaken over eight kilometres of road reserve, within a corridor less than 100 metres wide and wedged between mostly residential development created the primary complexity of the project. Combined with the environmental requirements and traffic management issues on local roads the project's integration between design, construction and operation was complex.
The project has won three major awards: