The Interlink M74 Joint Venture will provide a through-route from England to the West of Scotland, and involves the construction of two three-lane carriageways over eight kilometres of Brownfield land.
Project Director, David Welsh, commented: "We are delighted to be responsible for delivering this project which is the largest ever road construction scheme to be awarded in Scotland.
"We have worked closely with our client during the tendering process and we will continue to develop strong relationships with them to ensure the project is successfully completed,"he added.
Large-scale ground improvements, including large diameter piling, will be needed along the site following extensive remediation.
The scheme will also require the construction of 12 bridges along the route, including a 700 metre long steel composite launched bridge which will span Network Rail’s busy West Coast Main Line.
The work is being financed by Transport Scotland as well as Glasgow City Council, Renfrewshire and South Lanarkshire Councils.
Commenting on the project schedule, Welsh said: "Our design teams are already progressing the detailed design in readiness for construction work starting on site in May 2008."
Completion of the project is expected towards the end of 2011.