Precast products help speed massive motorway

Rocla is supplying a range of precast components to Australia’s largest urban infrastructure project, the Westlink M7 motorway in Sydney. Rocla® products include concrete pipes, box culverts, headwalls, gross pollutant traps and concrete power poles.

Westlink M7 is designed to improve transport in western Sydney by providing a north-south link between the three main motorways radiating from the city – the M5 in the southwest, the M4 in the west and the M2 in the northwest.

The 40km two-lane dual carriageway M7 motorway is scheduled for completion in late 2006. Seventeen interchanges along the motorway will provide access to local communities, improving transport options in these areas.

The motorway will provide safe travel at variable speeds up to 110 km/h, with 38 underpasses and overpasses to maintain local traffic access, as well as a total of 144 bridges. The shared cycle/pedestrian pathway is 4 metres wide and follows the motorway from Preston to Baulkham Hills, connecting with the Sydney Cycleway network. Two of Australia’s leading construction contractors, Leighton Contractors and Abigroup Contractors, formed a joint venture (Abigroup Leighton Joint Venture or ALJV) to design and construct the motorway. Major construction commenced in mid-2003 at several locations and is now occurring along most of the 40km corridor.

Work is also progressing on upgrading a number of existing local roads that will be linked to the motorway.

Rocla Pipeline Products is supplying large diameter pipes (from 825mm to 1800mm) for transverse drainage culverts along most of the M7, as well as smaller diameter pipes (375mm to 750mm) for under-road applications on the southern half of the project.

Precast box culverts were also supplied for approach roads, including large span culverts near Hoxton Park airport and smaller box culverts for the cycleway.

Rocla Water Quality is also supplying Rocla CleansAll® gross pollutant traps for some of the upgraded local roads adjoining the M7, as part of the project’s stormwater management plan.