A section of the eastern carriageway of the A329M going towards Bracknell will be shut, with a contraflow system in place. Instead of two lanes in each direction, there will be just one.
As a result of the work, motorists travelling eastbound towards Bracknell will not be able to leave the A329M but will be diverted via local roads to the Coppid Beech roundabout. Motorists wishing to join the A329M at Winnersh Triangle to go towards Bracknell will still be able to do so as normal.
However, drivers will no longer be able to join the A329M at Winnersh Triangle to go towards Reading, with traffic diverted via the A329, Church Road, Pitts Lane and A4.
Westbound traffic coming out of Bracknell will still be able to exit the A329M at Winnersh Triangle as normal.
There will be a 24-hour breakdown service available during the work.
Loddon Valley park and ride will still be open during the works. However, motorists are advised to allow extra time for the return route from Reading back to the park and ride car park as buses will be diverted along local roads. It is not expected that there will be delays on the Reading-bound route.
The A329M work is being carried out to strengthen the parapets of the Loddon Viaduct to prevent vehicles crashing onto the roundabout below, and to introduce a quieter road surface.
The work had been due to be carried out in January but was postponed to the school summer holidays because initial works in October to prepare for the project caused massive hold-ups across the local road network.
The Loddon Viaduct project is also now being done in two parts, with the eastbound carriageway of the A329M shut this summer and the westbound carriageway in summer 2015.