List of road projects in the UK

This article lists current and planned road building in the United Kingdom. Significant investment is expected, including plans for £14 billion of investment in road expansion by England's National Highways. 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.

England

 * Silvertown Tunnel
 * Heyhouses Link Road
 * Wichelstowe Southern Access
 * Grantham Southern Bypass
 * A5 Towcester bypass, expected to cost up to £38 million and be completed in 2023
 * St Austell to A30 link road
 * Botley Bypass
 * Lyminster Bypass
 * North-South Link Road

Scotland

 * Cross Tay Link Road

Northern Ireland

 * Newtownards Movilla Road to Donaghadee Road and Bangor Road Link
 * Larne Distributor (South)

Proposed new roads

 * Lower Thames Crossing
 * Stonehenge road tunnel
 * Longdendale Bypass
 * A new 16 km long dual carriageway paralleling the existing A428 road, between the A1 at St Neots and Cambourne, with enlarged junctions at either end. A £507 million contract to build the scheme was awarded in March 2021.
 * A new 12.9 km long dual carriageway between Morpeth and Felton, which will become part of the A1, expected to be completed by 2024-25
 * A new link road between the M54 and the M6, expected to be constructed between 2021–22 and 2024–25 at a cost of between £175 million and £200 million
 * Shrewsbury North West Relief Road
 * A new route to parallel the existing A83, currently under consultations
 * A27 Arundel bypass
 * A46 Newark-on-Trent bypass, under planning, expected to cost between £400m and £500m


 * Northampton North-West Relief Road, a 1.9 km bypass
 * 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)
 * Norwich Western Link route, a proposed new 3.8 mile dual carriageway road in Norfolk
 * A new 2.4 km dual carriageway west of Elmstead Market linking the A120 and the A133. Planning application submitted in April 2021 with an expected cost of £70 million.
 * A5036 Port of Liverpool Access
 * A66 Dualling Temple Sowerby to Appleby
 * A66 Dualling Stephen Bank to Carkin Moor
 * A64 Hopgrove, under planning,
 * Banwell Bypass – from the A371 west of Banwell, Somerset, to the A368 near Sandford, with a spur towards the A371 Winscombe.

Expansion

 * Dualling of the A9 between Perth and Inverness
 * A9 Tomatin to Moy (due 2027)
 * Dualling of the A96
 * A96 Inverness to Nairn including Nairn Bypass
 * A66 Dualling:
 * Penrith to Temple Sowerby
 * Appleby to Brough
 * Bowes Bypass
 * Cross Lanes to Rokeby
 * 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
 * Dualling of the A47 between North Tuddenham and Easton, expected to cost £100 million to £250 million, and between Blofield and North Burlingham at a cost of £50 million to £100 million.
 * An additional lane for both sides of the A1 between Birtley and Coal House, a 6.5 km stretch. Approved in January 2021, Highways England stated the cost of this scheme was "yet to be determined".
 * Partial dualling of the A5, expected to start in 2024–25 at a cost of £20 million to £25 million
 * Capacity increase for three junctions along the A38 in Derby, expected to start in 2021 and be completed by 2024–25 at a cost of £200 million to £250 million. The Secretary of State approved the scheme's Development Consent Order on 8 January 2021 allowing the scheme to proceed
 * M60 junction 18 capacity increase, expected to be constructed between 2024 and 2026 at a cost of between £66 million and £338 million
 * M42 capacity increase, including a new 2.4 km long dual-carriageway link road, a new junction, junction capacity increases, and a new pedestrian overbridge. Expected to be completed in 2024–25 at a cost of £282 million.
 * Berryden corridor, a road-widening project in Aberdeen
 * Grade separation of the Sheriffhall roundabout on the Edinburgh City Bypass, expected to cost £120 million
 * A465 Dowlais Top to Hirwaun (Section 5 and 6)
 * A1231 Dualling, Sunderland
 * A4440 Dualling, Worcester
 * A6 dualling - M22 to Castledawson
 * A6 dualling - Dungiven to Derry, under construction
 * M2 junction 5 (with the A249) capacity increase, started September 2021 and expected to end around Summer 2025 and cost £100 million
 * M621 junctions 1 to 7, capacity increase, Including extra lanes at J2.
 * A64 Askham Bryan Junction Improvement
 * M1/M62 Lofthouse Interchange

Legal Challenges
Legal challenges against the construction of specific roads:

A47 road schemes

A38 road expansion

Stonehenge Road Tunnel

Transport Action Network challenged the Government over its Road Investment Strategy 2 (RIS2) on climate grounds.