Project information
Our project covers renovating and widening two sections in the northeast and northwest quadrants of the M25, including highway design and construction, on and off slip roads and related work such as motorway control systems, drainage and landscaping. We are widening a total of 63km of the road from three to four lanes in each direction.
The project also includes complete refurbishment of the 1.2km long Hatfield Tunnel on the access road A1(M).
