Articles

The Bishopton Bypass

M8 Motorway

The four and a half mile long Bishopton Bypass was constructed in two stages. It is built to rural motorway standards and provides a link to the Erskine Bridge via the M898. The M8 motorway terminates at the end of the bypass and continues as the all-purpose A8 dual carriageway.

 

An upgrade of the A8 Greenock Road to provide a bypass of Bishopton and a link to the Erskine Bridge was first outlined in a 1963 Government White Paper. Early in the planning process it was assumed the route would be built as an all purpose dual carriageway. The decision to construct it as a motorway was made in the mid-1960s.

Key Data

Location

Stage 1

M8 (J29a-30)

Stage 2

M8 (J30-31)

Designer

Stages 1 & 2

Freeman Fox and

Partners

Contractor

Stage 1

Whatlings Ltd

Stage 2

Tarmac Civil Eng

Completion

Stage 1

27th December 1970

Stage 2

18th November 1975

Cost

Stage 1

£2.1 million

Stage 2

£4.4 million

Planning and Construction

The M8 Bishopton Bypass connects the M8 Renfrew Bypass to the A8 Greenock Road all purpose dual carriageway at West Ferry. Built as a two lane rural motorway with hard shoulders, the route is of a fairly simple design and has very few structures. Construction of Stage 1 began in 1967 having been let as part of the Erskine Bridge contract. The scope of Stage 1 was to provide a connection from the existing M8 Renfrew Bypass to the A726 Interchange to the south of the planned toll plaza. The contract also included the construction of the three level interchange at Craigton as well as the M898 link road. The works allowed for eventual extension west, and it was anticipated that construction of Stage 2 would commence before completion of Stage 1.

A long section of the Bishopton Bypass was built along the foreshore of the River Clyde. This reduced the need for costly acquisition of good quality agricultural land to the south of the motorway.

Construction of Stage 2 was delayed by a number of factors and finally began in the autumn 1973. A considerable amount of time was spent trying to determine an appropriate line for the motorway. Local farmers were angered by plans to route the road through good quality agricultural land, and the decision by the Scottish Office to await the publication of a report into the future of the Clyde ports also resulted in delay. Eventually a route near to the shoreline of the River Clyde was chosen and this was taken through a Public Local Inquiry. The route was completed in November 1974, almost five years after the opening of Stage 1.

 

The completion of the bypass reduced traffic through Bishopton by over 80%. Today the section between junctions 30 and 31 carries almost 30,000 vehicles every day.

In 2019, a new junction was constructed on the M8 at Bishopton. A junction had previously existed in this location until the completion of the second stage of the Bishopton Bypass in 1975.

This article was first published in December 2020.

Related Content

Next

The Renfrew Bypass

Galleries

>  Bishopton Bypass

>  M8

Connecting Routes

Erskine Bridge

M8 Motorway

M898 Motorway

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© Glasgow Motorway Archive (2020)

Glasgow Motorway Archive was inspired by John M. Cullen (1928-2018) and was made real with the generous donation of his private archive of engineering and technical records. Thank you John, we think of you often. 

All works © Glasgow Motorway Archive (2010-2021) except where stated. Reproduction and distribution of material without written permission is prohibited. 

M8 Motorway at Junction 29a, previously.the start of the Bishopton Bypass