The Welsh Government has awarded the firm a four-year technology contract worth around £15m is for the maintenance of Road Network Communications and Tunnel Systems across Wales.
The contract involves routine maintenance and fault repair of technology systems such as CCTV cameras, variable messaging signs, emergency telephones and traffic signals and includes the strategic routes of the M4, A55, and Conwy tunnels.
Costain will start the job early next year.
The firm has also won a place on the The Highways Agency’s Asset Support Framework in the North and South regions.
The deals augment the Agency’s Asset Support Contracts by allowing it to call on suppliers, including Costain, for larger maintenance schemes and improvement works, up to the value of £15m each.
More than £750m of work packages are expected to be awarded through the framework over the next three years.
Costain is one of five contractors on each framework that will operate for three years, with scope for an extension of up to a further 12 months.
Work packages could include surfacing works, structures works, technology related works, and general highway improvements across the whole of the Highways Agency motorway and trunk road network.
Andrew Wyllie, Chief Executive of Costain, said: “We are delighted with these additional appointments from existing customers, which demonstrate the ongoing success of the implementation of our ‘Choosing Costain’ strategy: providing a broader service offering to the major customers who are making significant investment in the UK’s national infrastructure needs.”