This article lists current and planned road building in the United Kingdom. Significant investment is expected, including plans for £14billion of investment in road expansion by England's National Highways.[1] In addition to physical expansion, smart motorways have been pursued as a means to increase capacity by introducing regular traffic on the hard shoulder. Transport is devolved, projects in Scotland, Wales, and Northern Ireland are delivered in co-operation with the devolved authorities of Transport Scotland, the Welsh Government, and DfI Roads respectively.
Black Cat to Caxton Gibbet. A new 16 km (9.9 miles)-long dual carriageway, to be renamed A421, mostly paralleling the existing A428 road, between the A1 south of St Neots and Caxton Gibbet, with enlarged junctions at either end.[5] A £507million contract to build the scheme was awarded in March 2021.[6]
A new 12.9 km (8.0 miles) long dual carriageway between Morpeth and Felton, which will become part of the A1, expected to be completed by 20242025[7]
A new link road between the M54 and the M6, expected to be constructed between 20212022 and 20242025 at a cost of between £175million and £200million[8]
Northampton North-West Relief Road, a 1.9 km (1.2 miles) bypass[12]
A509 Isham bypass. Will start at Junction 9 A14 Kettering, bypassing Isham village reconnecting at Great Harrowden, reducing traffic between Kettering and Wellingborough.
Ashbourne bypass (a new 2.8 km road to the west of Ashbourne in Derbyshire)[13]
Norwich Western Link route, a proposed new 3.8 mile dual carriageway road in Norfolk[14]
A new 2.4 km (1.5 miles) dual carriageway west of Elmstead Market linking the A120 and the A133. Planning application submitted in April 2021 with an expected cost of £70million.[15]
Dualling of 8 km (5 mi) of the A1 between Alnwick and Ellingham and 12.9 km (8 mi) between Morpeth and Felton, This is still awaiting government consent with a decision now due in June 2024[7]
An additional lane for both sides of the A1 between Birtley and Coal House, a 6.5 km (4.0 miles) stretch. Approved in January 2021, Highways England stated the cost of this scheme was "yet to be determined".[20]
Partial dualling of the A5, expected to start in 20242025 at a cost of £20million to £25million[21][22]
Capacity increase for three junctions along the A38 in Derby, expected to start in 2021 and be completed by 20242025 at a cost of £200million to £250million.[23] The Secretary of State approved the scheme's Development Consent Order on 8 January 2021 allowing the scheme to proceed[24]
M60 junction 18 capacity increase, expected to be constructed between 2024 and 2026 at a cost of between £66million and £338million[25]
M42 capacity increase, including a new 2.4 km (1.5 miles) long dual-carriageway link road, a new junction, junction capacity increases, and a new pedestrian overbridge. Expected to be completed in 20242025 at a cost of £282million.[26]
