Network changes - 1970s

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A list of the changes to the road network in Great Britain from 1970 - 1979. Includes road openings and renumberings.

Road Openings

Year Number on opening Location Traditional County Notes
1970 A40(M) East Acton to Paddington Middlesex Westway downgraded to A40 in 1998
1970 A1(M) Birtley County Durham Birtley Bypass
1970 A194(M) Birtley - A184 County Durham Entire Motorway
1970 A1 Morpeth Northumberland Morpeth Bypass
1970 A1 Alnwick Northumberland Alnwick Bypass stage 1
1970 A74 Mossband Viaduct - Guards Mill Cumberland Dualling, later replaced by M6 in 2008
1970 A890 Stromeferry Bypass Ross-shire Subsumed former B856 Strathcarron Station to Strathcarron Junction.
1970 A9 Stirling Stirlingshire Stirling Inner Bypass
1970 M5 Strensham - Tewkesbury Gloucestershire Extended from J8 to J9
1970 M5 Portbury - Clevedon Somerset Extended from J19 to J20
1970 M6 Great Barr - Ray Hall Staffordshire Extended from J7 to J8 M6
1970 M6 Ray Hall - Bescot Staffordshire Extended from J8 to J9
1970 M5 Ray Hall - Quinton Staffordshire
Worcestershire
Extended from J3 to meet M6
1970 M6 Carnforth - Penrith Lancashire
Westmorland
Extended from J35 to southern end of Penrith Bypass J40
1970 M6 Carlisle Cumberland Carlisle Bypass J42 to J44
1970 M8 Kingston Bridge, Glasgow Lanarkshire Bridge opened by HM The Queen Mother on 26 June. J19 to J20
1970 M9 Spur Kirkliston West Lothian Kirkliston Bypass
1970 M32 Hambrook - Eastville Gloucestershire Stapleton Bypass
1970 M61
A666(M)
Horwich to Worsley Lancashire Present J1 to J4
1970 A59 Chatburn - Billington Lancashire Clitheroe & Whalley Bypass
1970 A85 Glendoick - North Inchmichael Perthshire Dualling, later renumbered to A90 in 1994
1970 A9 Helmsdale Caithness Helmsdale Bridge
1970 C22 Sheildaig - Kenmore Ross-shire Part of Applecross northern coastal route; now Highland C1087. Opened 11 May 1970; rest of road to Applecross Bay took until 1975.
1971 M9 Raploch - Keir Roundabout Stirlingshire Stirling Bypass Stage 1 Extended from J10 to J11
1971 A77 Ayr Ayrshire Ayr Bypass
1971 A38 Lee Mill Devon Lee Mill Bypass
1971 A63 South Cave - Elloughton Yorkshire Elloughton Bypass
1971 A591 Kendal Westmorland Kendal Bypass
1971 A19 Easington - Seaham County Durham Easington & Seaham Bypass
1971 A5 Capel-Y-Graig - Llanfair Anglesey
Caernarfonshire
Opening of Britannia Bridge, later renumbered as A55 in 2000
1971 A1 Allerton Yorkshire Flyover junction
1971 A1 Scotch Corner Yorkshire Scotch Corner Diversion
1971 A1 Great Casterton - South Witham Rutland Dualling
1971 A21 Tonbridge Kent Tonbridge Bypass
1971 M5 Tewkesbury - Moreton Valence Gloucestershire Extended from J9 to J13
1971 M5 Moreton Valence - Almondsbury Gloucestershire Extended from J13 to J15
1971 M6 Maxstoke - Bromford Warwickshire Extended from J4 to J5
1971 M6 Ansty - Maxstoke Warwickshire Extended from J2 to J4
1971 M6 Catthorpe - Ansty Warwickshire
Leicestershire
Extended from J2 to M1
1971 M6 Caithwaite - Carlisle Cumberland Extended from J41 to J42
1971 M6 Bromford - Gravelly Hill Warwickshire Extended from J5 to J6
1971 M602 Patricroft - Eccles Lancashire Eccles Bypass from J1 to J2
1971 A898 Erskine - Kilpatrick Dunbartonshire Opening of Erskine Bridge
1971 M4 Reading - Tormarton Berkshire
Wiltshire
English M4 completed from J12-18, December 1971
1971 M57 Knowsley - Netherton Lancashire Liverpool Outer Ring Road from J4 to J7
1971 A46 Leek Wootton - Longbridge Warwickshire Warwick Bypass
1972 A2 Dartford Kent Second Dartford Bypass opens. Old road renumbered A2018, B2174, A225 & A296
1972 A2 Dover Kent Jubilee Way opens to bypass eastern Dover
1972 A11 Cringleford Norfolk Cringleford Bypass
1972 A19 Thirsk Yorkshire Thirsk Bypass
1972 A899 Broxburn to Mid Calder West Lothian Expressway
1972 A38 Lichfield Staffordshire Lichfield Eastern Bypass
1972 A38(M) Aston, Birmingham Warwickshire Aston Expressway
1972 A50 Sudbury Derbyshire Sudbury Bypass
1972 A627(M) Rochdale to Oldham Lancashire Entire Motorway
1972 M90 Lochran-Arlary Perthshire Kinross Bypass. First motorway to be built with concrete surface.
1972 M6 Gravelly Hill - Great Barr Staffordshire
Warwickshire
Extended from J6 to J7 & Opening of Spaghetti Junction
1972 M73 Maryville - Mollinsburn Lanarkshire Entire Motorway from J1 to J3
1972 A82 Alexandria Dunbartonshire Alexandria Bypass Southern Section
1972 M606 Bradford - Euroway Yorkshire From J2 to J3
1973 M606 Euroway - M62 Yorkshire From J1 to J2
1973 A329(M) Reading - Bracknell Berkshire Entire Motorway
1973 A814 Partick - M8, Glasgow Lanarkshire Clydeside Expressway
1973 A27 Arundel Sussex Arundel Bypass
1973 A77 Bogend Toll - Fenwick Ayrshire Kilmarnock Bypass
1973 A76 Hurlford Ayrshire Hurlford Bypass
1973 A85 Inchyra - Glendoick Perthshire Dualling, later renumbered to A90 in 1994
1973 A41 West Bromwich Staffordshire West Bromwich Town Centre Bypass
1973 A41(M) Tring Hertfordshire Tring Bypass,later downgraded as A41 in 1987
1973 A604 A1 - Godmanchester Huntingdonshire Huntingdon Bypass, now part of A14
1973 A34 Oxford Oxfordshire Oxford Western Bypass Dualling
1973 A38 Ivybridge - Wrangaton Devon Ivybridge Bypass
1973 A74 Mossband Viaduct - Kirkpatrick Fleming Dumfriesshire Dualling, it was replaced by a motorway in 1992 & 2008
1973 M5 Clevedon - Edithmead Somerset Extended from J20 to J22
1973 M5 Edithmead - Down End Somerset Highbridge Bypass from J22 to J23
1973 M5 Down End - Huntworth Somerset Bridgwater Bypass from J23 to J24
1974 M5 Deane Gate - Wellington Somerset Taunton Bypass from J25 to J26
1974 M80 Haggs - Pirnhall Stirlingshire Extended from Dunipace to M9. M876 introduced on A876 from Bankhead to North Broomage
1974 M9 Pirnhall - Raploch Stirlingshire Stirling Bypass Stage 2 extended from J9 to J10
1974 M5 Avonmouth - Portbury Gloucestershire
Somerset
Avonmouth Bridge from J18 to J19
1974 A40 Witney Oxfordshire Witney Bypass
1974 A46 A45 - Lee Wooton Warwickshire Kenilworth Bypass
1974 M57 Huyton Quarry - Knowsley Lancashire Liverpool Outer Ring Road extended from J1 to J4
1974 A82 Fort William Inverness-shire Fort William Town Centre Bypass
1974 A85 Kinfauns - Inchyra Perthshire Dualling, later renumbered to A90 in 1994
1974 M23 Hooley - Merstham Surrey Present J7 to J8
1974 A38 Plympton Devon Plympton Bypass
1974 A38 South Brent Devon South Brent Bypass
1974 A38 Ashburton - Heathfield Devon Coldeast Bypass & Dualling
1974 A38 Chudleigh Devon Chudleigh Bypass
1974 A38 Lichfield - Gravelly Hill Staffordshire
Warwickshire
Sutton Coldfield Bypass
1975 A38 Findern - A52 Derbyshire Derby Western bypass Stage 2
1975 A11 Newmarket Suffolk
Cambridgeshire
Newmarket Bypass
1975 A17 Sleaford Lincolnshire Sleaford Bypass
1975 A19 Crathorne Yorkshire Crathorne Bypass
1975 A61 Sheffield - Chesterfield Derbyshire Dronfield & Unstone Bypass
1975 A58(M) Armley - Westgate, Leeds Yorkshire Inner Ring Road Stage 3
1975 A1(M) Town Moor - Tyne Bridge, Newcastle upon Tyne Northumberland Newcastle Central Motorway, later renumbered to A6127(M), now A167(M)
1975 M23 Merstham - Pease Pottage Surrey
Sussex
Present J8 to J11
1975 M23 Spur Gatwick Airport Surrey Gatwick Spur
1975 M32 Eastville - St Agnes Gloucestershire Final stage
1975 M5 Willard - Exeter Devon Sowton & Killerton Sections from J27 to J30
1975 M5 Huntworth - Deane Gate Somerset North Petherton bypass from J24 to J25
1975 M54 Priorslee - Cluddley Shropshire Initial section of M54 between Priorslee Interchange and present J7
1975 M55 Fulwood - Blackpool Lancashire Extended from J1 to J4
1975 M66 Simister - Pilsworth Road Lancashire Bury Eastern Bypass stage 1
1975 M898 Bishopton - Erskine Renfrewshire Entire Motorway
1975 A31 Ringwood - Cadnam Hampshire Section dualled
1975 A82 Ballachulish Argyll Ballachulish Bridge bypassing Kinlochleven
1975 A2 Boughton Kent Dual carriageway bypassing the villages of Boughton and Dunkirk.
1975 A30 Scorrier - Camborne Cornwall Redruth - Poole - Camborne Bypass
1975 A9 Inveralmond Perthshire Almond Bridge
1975 A9 Duncanston-Findon Mains Ross-shire Cromarty bridge approaches
1975 A92 Cammachmore Kincardineshire Cammachmore Bypass, later renumbered to A90 in 1994
1975 C22 Applecross - Kenmore Ross-shire Applecross northern coastal route; now Highland C1087. The Kyle of Lochalsh - Toscaig ferry ceased around the same time.
1976 A94 Brechin Angus Brechin Bypass as single carriageway, later dualled in 1994
1976 M5 Wellington - Willand Somerset Chelston-Willand from J26 to J27
1976 A282 Darenth - Swanley Kent Dual carriageway linking the A2 Darenth interchange with Swanley Interchange. Later on upgraded and renumbered as the M25.
1976 A3 Cobham - Kingston Upon Thames Surrey Esher Bypass
1976 A41 Thornburn Road - Tranmere Roundabout Cheshire New Ferry Bypass Stage 2
1976 A55 Hoole Village - Broughton Cheshire
Flintshire
Chester Bypass
1976 A85 Friarton Bridge - Kinfauns Perthshire Kinfauns Bypass & Dualling, later renumbered to A90 in 1994
1976 A64 York Yorkshire York Southern Bypass
1976 A66 Keswick Cumberland Keswick Bypass
1976 A63 Newport - South Cave Yorkshire Dualling
1976 A69 Heddon - Westerhope Northumberland Heddon, Throckley & Horsley Bypass
1976 A75 Gretna Dumfriesshire Gretna Bypass
1976 M275 Cosham - Portsmouth Hampshire Entire Motorway
1976 A38 Liskeard - Trerulefoot Cornwall Liskeard Bypass & Dualling
1976 A30 Bolventor Cornwall Bolventor Bypass
1976 A30 Launceston Devon
Cornwall
Launceston Bypass
1976 A30 Bodmin Cornwall Bodmin Bypass
1976 A9 Drumochter Lodge-Crubenmore Inverness-shire Dalwhinnie bypass
1976 A9 Dalmagarry-Slochd Inverness-shire Tomatin Bypass
1976 A9 Longman Roundabout to Bogbain Inverness Kessock bridge South approach
1976 A9 Newmill-Birnam Perthshire Bankfoot bypass
1976 M69 Hinckley Road - Enderby Leicestershire Present J2 to J3
1976 N/A Arnish Road, Raasay Inverness-shire Hand-built by local resident Calum Macleod; now Highland U4912.
1977 M69 Coventry - Hinckley Road Warwickshire
Leicestershire
M6 to J2
1977 M4 Morriston Glamorgan J44-46 Morriston bypass, renumbered from A48(M) immediately before opening
1977 A66 Brough Westmorland Brough Bypass
1977 A9 Birnam - Dowally Perthshire Birnam & Dunkeld Bypass
1977 A9 Luncarty Perthshire Luncarty bypass
1977 M5 Exeter Devon Exminster Section from J30 to J31
1977 M4 Pontarddulais bypass Glamorgan
Carmarthenshire
J46-49 Pontarddulais bypass opened
1977 M4 Pyle Glamorgan J37-39 Pyle bypass opened
1977 M4 Tredegar Park - St Mellons Monmouthshire J28 to J29A (including what is now A48(M)) opened
1977 M4 Coryton - Pencoed Glamorgan J32-35 section opened
1977 A45 Cambridge Cambridgeshire Cambridge Northern Bypass originally as A45, later renumbered as A428 and A14 in 1990's
1977 A46 A45 - Whitley Warwickshire Cheylesmore Bypass originally as A46, later renumbered as A444 in 1989 when Coventry Eastern Bypass was opened
1977 A69 Corbridge - Hexham Northumberland Corbridge to Hexham Bypass
1977 A31 Ringwood Hampshire Ringwood bypass opened
1977 A38 Little Eaton - Holbrook Derbyshire Little Eaton Bypass
1977 A38 Holbrook - Alfreton Derbyshire Ripley & Swanwick Bypass
1977 A38 Kennford - M5 J31 Devon Exeter Bypass
1977 M8 Glasgow - Renfrew Lanarkshire
Renfrewshire
Extended from J20 to J26
1977 M77 M8 - Dumbreck Lanarkshire Constructed to J1
1978 M66 Pilsworth Road - Edenfield Lancashire Bury Eastern Bypass stage 2
1978 M67 Denton - Hattersley Cheshire Hyde Bypass
1978 M90 Perth Perthshire Extended from J10 to A9, now spur of M90 to the west of Perth
1978 M85 Perth Perthshire Former M85, now mainline of M90
1978 A15 Barton Upon Humber - M180 Lincolnshire Expressway
1978 M181 M180 - Scunthorpe Lincolnshire Entire Motorway
1978 M271 Upton - Towton Hampshire Entire Motorway
1978 A34 Oxford - Abingdon Berkshire Abingdon Bypass
1978 A64 Tadcaster Yorkshire Tadcaster Bypass
1978 A64 Malton Yorkshire Malton & Norton Bypass
1978 A48
A4161
St Mellons - Rumney Monmouthshire St Mellons & Rumney Bypass & Southern Way
1978 A30 Alphington - Whiddon Down Devon Tedburn St Mary & Crockenwell Bypass
1978 A9 Blackford Perthshire Blackford Bypass
1979 A9 Crubenmore - Kingussie Inverness-shire Newtonmore & Kingussie Bypass
1979 A9 Findon-Arduille Cromartyshire Opening of Cromarty Bridge
1979 A9 Drumochter summit to Calvine Inverness-shire Construction of split level dual carriageway and temporary tie in at Calvine
1979 A9 Dalmagarry to Bogbain Inverness-shire Moy and Daviot Bypass
1979 A9 Avielochan to Slochd Inverness-shire Carrbridge bypass
1979 A96 Huntly Aberdeenshire Huntly Bypass
1979 A75 Newton Stewart Dumfriesshire Newton Stewart Bypass
1979 A49 Ludlow Shropshire Ludlow Bypass
1979 A1 Redhouse Yorkshire Redhouse Junction Improvement
1979 A1(M) Hatfield - South Mimms Hertfordshire Extended from J1 to J2 replacing A1
1979 A3(M) Bedhampton - Horndean Hampshire Horndean & Waterlooville Bypass
1979 A604 Bar Hill - Huntingdon Huntingdonshire
Cambridgeshire
Later renumbered as A14 in 1994

Other changes in 1970s

  • A38 Cullompton bypass swallowed up by M5.
  • Kyle of Lochalsh to Toscaig ferry route withdrawn following completion of Applecross coast road.
  • Completion of the reclassification of all the Republic of Ireland's roads.



Network changes - 1970s
Historical Information
1922 Road Lists Class IZone 1 • Zone 2 • Zone 3 • Zone 4 • Zone 5 • Zone 6 • Zone 7 • Zone 8 • Zone 9 • Northern Ireland
1922 Road Lists Class IIZone 1 • Zone 2 • Zone 3 • Zone 4 • Zone 5 • Zone 6 • Zone 7 • Zone 8 • Zone 9 • Northern Ireland
1935 Road numbering revisionZone 1 • Zone 2 • Zone 3 • Zone 4 • Zone 5 • Zone 6 • Zone 7 • Zone 8 • Zone 9
Mass renumbering schemes1922 Draft Road Lists • 1924 A1 Renumbering • 1920s South Buckinghamshire Renumbering • 1933 A30 Renumbering • 1933 Scotland Renumbering Proposals • 1934 A82 Renumbering • Tyneside Renumberings • Motorway linked Renumberings • Republic of Ireland T and L roads
Network Changes1700-1799 • 1800-1899 • 1900-1909 • 1910-1919 • 1920-1929 • 1930-1939 • 1940-1949 • 1950-1959 • 1960-1969 • 1970-1979 • 1980-1989 • 1990-1999 • 2000-2009 • 2010-2019