NMWTRA manages over 680 miles of the strategic trunk roads in North and Mid Wales including four A55 tunnels on behalf of the Welsh Government.
The two-year deal with the option of a further two 12-month extensions will see Tarmac maintain roads across Wrexham, Denbighshire, Flintshire, Powys and Ceredigion.
It will also enable Tarmac to bid for improvement projects on the A55 North Wales Expressway, an 87-mile route connecting the coastal town of Holyhead in Anglesey to Chester in England.
Tarmac will draw on its extensive network of Welsh asphalt plants including Dolyhir in Presteigne to provide on-demand, regional access to Welsh materials while supporting local jobs and boosting SME supply chains.
Neil Carrick, Commercial Manager – Contracting Midlands at Tarmac, said: “We look forward to further developing our successful relationship with NMWTRA and working collaboratively to minimise disruption and prioritise the safety of operatives and road users.
“As part of the contract delivery, we will draw on our extensive network of Welsh quarries and plants to secure local jobs and also create thriving supply chains which drive social and economic value.”