The scheme, part of the Government’s national Pinch Point Programme to invest in the country’s road infrastructure, will involve the extension of existing sliproads onto the A38 and is due to be completed in March next year.
During the first phase of the work, between October and December 2014, work will be carried out on the eastbound entry slip road. It will be necessary to close the slip road overnight on occasions, although the closures will be limited on Thursdays to take account of Christmas late night shopping in the city centre.
In the second phase of work, after Christmas, the closures will switch to the westbound entry slip road, which will be closed 24 hours a day throughout this period.
During the work, narrow lanes will be in place on the A38 and a temporary 50mph speed limit will be in force for the safety of road users and workers.
Highways Agency project sponsor, David Stock, said:
Manadon junction suffers from congestion and delays due to current slip road design. The improvements proposed to the slip roads will aid merging traffic and result in a better flow of traffic through the junction, increasing capacity and boosting economic growth in the area.
During eastbound overnight closures, traffic joining the A38 at Manadon will be diverted north to Tavistock Road, east along Fort Austin Avenue and Forder Valley Road, joining the A38 at Marsh Mills.
During westbound closures, traffic planning to join the A38 will be diverted north along Tavistock Road, then via Meavy Way, along Crownhill Road to join the A38 at St Budeaux.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.