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A38 Manadon Interchange

Manadon Interchange header graphic

The roundabout, which serves as an interchange for the A38 from Cornwall and East Devon and the A386 from North Devon, is one of the busiest junctions on Plymouth's road network with over 60,000 journeys passing through each day.

Not only is it on part of a major public transport corridor with over 30 buses passing through every hour, it also has a popular school nearby and forms a key route to Derriford Hospital.

As a result, the roundabout experiences significant congestion at peak times on each of the signalised arms with traffic often queuing back onto the A38.

With the predicted growth of the city and the need to support additional housing promised by the Council’s Plan for Homes, transport infrastructure like that at Manadon, will need to be addressed.

The Council are now investigating ways to improve this main corridor between northern and central Plymouth and are inviting public opinion to inform the design.

The scheme objectives are road safety, reducing congestion, improving air quality and upgrading current walking and cycling links to encourage sustainable transport.

Scheme Development

The A38 Manadon Interchange Strategic Outline Business Case (SOBC) was submitted to Peninsula Transport Sub-National Transport Body in July 2019 and sent to the Department for Transport (DfT) for review. In September 2019 the DfT announced that the Manadon bid was successful for funding to develop the Outline Business Case (OBC). 


A consultation was carried out between 16 November 2020 and 4 January 2021. Over 8000 letters were sent directly to householders to invite them to take part, major stakeholders were also contacted, a press release was issued and information posted on all our social media platforms in order to maximise the amount of responses. Due to the pandemic Plymouth City Council were unfortunately unable to hold face to face events and the consultation was hosted online. 

The findings from this consultation can be found in the two documents:

Her Majesties government logo with the text HM Government