Despite having a vast number of available designations, the authorities have still managed to allocate a surprisingly large amount of numbers to more than one road.
This page attempts to list all of the cases where road numbers are duplicated. These will be completely different roads, but with the same number (not including cases where a multiplex occurs - a road sharing the route of another road, such as the M62 in Greater Manchester). Generally these roads will be some distance apart, often 100 miles or more, but some are quite close together.
A594
- Original road: Papcastle to Maryport, Cumbria
- Second road: Leicester Ring Road
A601
- Original road: Derby Inner Ring Road
- Second road: Carnforth Link Roads, Lancashire (A601(M))
A1042
- Original road: Norwich Outer Ring Road
- Second road: Kirkleatham to Redcar, Teesside
A1114
- Original road: Blaydon to Teams, Gateshead
- Second road: Great Baddow to Howe Green, Chelmsford
A1199
- Original road: Canonbury to Highbury, London
- Second road: Cambridge Park to Woodford Green, London
A4102
- Original road: Merthyr Tydfil
- Second road: Amblecote, West Midlands
A6013
- Original road: Bamford, Derbyshire
- Second road: Kettering, Northamptonshire (formerly A43)
B198
- Original road: Cheshunt South Western Bypass, Hertfordshire
- Second road: Wisbech, Cambridgeshire (formerly A47)
B454
- Original road: London NW9
- Second road: Brentford to Southall
B2122
- Original road: Brighton
- Second road: Leatherhead, Surrey
B3165
- Original road: Somerton to Lyme Regis
- Second road: Ash, Surrey
B3206
- Original road: Easton to Chagford, Devon
- Second road: Ash, Surrey
B3330
- Original road: Ryde to Brading, Isle of Wight
- Second road: Winchester to M3 J10
B3331
- Original road: Kite Hill to Ferry, Isle of Wight
- Second road: Winchester
B3440
- Original road: Willand to Uffculme, Devon
- Second road: West Wick to Weston-super-Mare, Somerset
B4027
- Original road: Over Kiddington to Wheatley, Oxfordshire
- Second road: Binley to Cross-in-Hand, Warwickshire
B4065
- Original road: Droitwich Spa, Worcestershire
- Second road: Ansty to Wolvey, Warwickshire
B4082
- Original road: Pershore to Upton Snodbury, Worcestershire
- Second road: Binley to Little Heath, West Midlands
B5038
- Original road: Stoke-on-Trent
- Second road: Trentham to Clayton, Staffordshire
B5544
- Original road: Mold to Llong
- Second road: Pentre-chwyth to Winsh-wen, Swansea
B6374
- Original road: Galashiels to Melrose, Borders
- Second road: Heage to Ripley, Derbyshire
Based on a list originally compiled by Paul Berry.
 |
 |
 |
 |