The next phase of work on a roundabout which is part of the new access road to a 300,000 tonne per year waste incinerator in Calvert is due to get underway next week.
The latest work will allow the roundabout on the A41 at Woodham to be completed.
As part of the work, 24-hour temporary traffic signals will be used at the site from 22 April for 10-15 weeks.
Work is nearly complete on the Quainton to Edgcott road, where a new bridge deck has been constructed to carry the new access road.
It is hoped that the road underneath the bridge will be surfaced on either April 24 or 25 to allow the road to be re-opened to traffic on Monday April 28.