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A1/Early Improvements

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Listed by date, then by north to south.

1926: Colsterworth Bypass

Single carriageway, dualled later.

1927: Welwyn Bypass

Became B197 in 1960s.

1928: East Linton Bypass

Now part of A199.

1928: Tyne Bridge

Now part of A167.

1929: Wansford Bypass

Single carriageway, dualled later.

1930s: Chester le Street and Birtley Bypass

The southern section around Chester le Street, taking Park Road South and Park Road North now forms part of the A167, while the northern section around Birtley was incorporated into the route for the late 1960s A1(M) upgrade.

1932: Haddington Bypass

Now part of A199.

1932: Bilsdean and Dunglass Bypass

More details required.

c.1950s Elkesley Bypass

Short bypass of new dual carriagways to the north of the village, built as the A57, later becoming part of the A1

1957: Markham Moor to Elkesley

Short section of new dual carriageway to bypass West Drayton, built as the A57, the old line of which can be seen just to the east of the B6387 on the northern side of the A1, between the current mainline and the River Idle.

1957: Alconbury to Conington

First of a series of improvements to the A1 to upgrade from narrow and winding single carriageway to a full dual carriageway. The scheme extended between Alconbury Hill, where it joined the old route to the A1 through Alconbury, to the B660.

1958: Leeming Bypass

More details required.

1958: Elkesley to Apleyhead

Further improvement along the previous line of the A57. 3 miles of new dual carriageway and improvements to an existing single carriageway to make into dual carriageway. Reasonable to suggest that the roundabout at Apleyhead (Apleyhead Roundabout) was constructed at this time. Elkesley was bypassed at some point before.

1958: Stilton Bypass

Linking to the earlier A1 upgrade at the B660, the improvement created a bypass to the east of Stilton, the northern temporary terminus is unknown, but could have been at Norman Cross, at the southern terminus of the A15. Opened by David (later Lord) Renton in July 1958, costing £2.5 million.

1959: Catterick Bypass

More details required.

1959: Wetherby Bypass

Opened 26th October.

1959: Apleyhead to Ranby

About 1.5 miles of upgrade to the previous A614 route to dual carriageway.

1959: Stibbington Bypass

More details required.

1959: North of Alconbury

More details required.

1960: Allerton to Boroughbridge

More details required.

1960: Wetherby to Allerton

More details required.

1960: Micklefield Bypass

More details required.

1960: Blyth Bypass

As part of the motorway bypass for Doncaster. 2.75 miles of the new A1 including the part of the Doncaster bypass in Nottinghamshire and the whole of the Blyth Bypass was constructed to a West Riding specification in a separate contract to the motorway, with a roundabout to the north of Blyth, which was later replaced in 2009 with a dumb bell grade separated junction. The bypass section was opened in December 1960.

1960: Grantham Bypass

About 6 miles of dual carriageway bypass, with a roundabout at the northern end meeting the B1174 and a grade separated junction at the southern end near Little Ponton. Two further grade separated junctions where constructed at the junction with the A52 and A607. The northern roundabout was replaced in 2009 by a new dumb bell style grade separated junction.

1960: Stamford Bypass

Between Tickencote and Carpenters Lodge, About 4 miles of dual carriageway bypass with a roundabout at each end. The northern roundabout upgraded to a grade separated junction in 1971 and the southern roundabout upgraded to a compact grade separated junction in 2009.

1960: Wyboston

Roundabout at the junction of the A1 (now B1428) and the A428, pre dating the bypass around St Neots. Later reused as part of a Trumpet junction improvement built as part of the St Neots bypass.

1960: Biggleswade Bypass

Nearly 3 miles of dual carriageway bypass, with roundabouts each end, both of which survive to date.

1960: South Mimms Bypass

At grade roundabout in place at the current junction of A1(M) and A1 before current grade separation to accommodate the M25 and the 1979 upgrade of the South Mimms Bypass to full motorway standard in 1979. Geometry of A1(M) suggests somewhere north of St Albans Road, which would have been the A6.

1960: Apex Corner

Junction improvement to enlarge the existing roundabout, presumably to accommodate the increase in traffic because of the diverted route of the A1 along the Barnet Bypass which was previously the A555.

1961: Wentbridge to Ferrybridge

More details required.

1961: Wentbridge Bypass

More details required.

1961: Redhouse to Wentbridge

More details required.

1961: Doncaster Bypass

First part of A1 to be A1(M).

1962: Brotherton Bypass

More details required.

1962: Blyth to Ranby

Upgrade of former alignment of the A614 from single carriageway to dual carriageway, following generally the same route.

1962: Stevenage Bypass

The original A1(M) Stevenage Bypass, terminated at junctions 6 and 8. Roundabouts where constructed at each end, however it is unclear at this time how these would tie into the current junction arrangements.

1963: Boroughbridge Bypass

More details required.

1963: Aberford Bypass

More details required.

1964: Brotherton to Micklefield

More details required.

1964: Newark Bypass

Opened in by Ernest Marples on 27th July 1964, the southern terminus is indicated on some maps of the day as being the current roundabout on the B6326 London Road, reverting to the old single carriageway at the county boundary, about where the current B6326 joins the current A1. The northern extent was North Muskham.

1964: Alconbury Bypass

More details required.

1965: Darlington Bypass

Part of A1(M), opened in May 1965 at a cost of £6.5m

1965: Aberford to Wetherby

More details required.

1967: Ferrybridge Bypass

More details required.

1967: Sutton On Trent, Tuxford and Markham Moor Bypass

More details required.

1967: Baldock Bypass

Part of A1(M).

1968: Long Bennington Bypass

More details required.

1969: Durham Motorway

New, off-line motorway opened in September 1969 between Darlington and Birtley Bypasses.

1970: Alnwick Bypass

Stage 1. Stage 2 would not open until 1985.

1970: Seaton Burn and Blagdon Bypass

A two-lane dual carriageway bypass of Seaton Burn and Blagdon.

1970: Morpeth Bypass

A two-lane dual carriageway bypass of Morpeth.

1970: Birtley Bypass

A1(M) upgrade to existing 1930s bypass around Birtley.

1970: White Mare Pool to Black Fell

A1(M) new alignment north of Birtley to the Tyne Tunnel.

1971: Scotch Corner Diversion

Roundabout Grade-Seperated.

1971: Allerton flyover junction

A59 re-routed to west.

1971: Tickencote to South Witham

Approximately 8.5 miles of dual carriageway, completing the final stage of the dual carriageway upgrades along the southern part of the A1. The scheme replaced a roundabout at Tickencote built in 1960, with a grade separated junction. Opened to traffic on the 11th August 1971 and built by Turriff of Salisbury in two years for Rutland County Council at a cost of £2.25m, and opened by the Earl of Gainsborough - the Chairman of the council. Single grade road from Empingham to Edith Weston opened on the same day.

1973: Stanborough to Welwyn

Part of A1(M).

1974: Gateshead Western Bypass

Construction of the Gateshead Western Bypass; which in 1990 would form the re-routed A1 around the west of Newcastle

Related Pictures
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London Awayday - Archway - Coppermine - 17505.jpgGB1960b.jpgRainy day at Colsterworth roundabout from the south bridge - Coppermine - 22010.JPGOld A1 3 - Coppermine - 2863.jpgCroxdale Road Bridge - Geograph - 1389746.jpg