Staff expertise will be consolidated into fewer offices with a more streamlined management structure.
The new organisation brings together all major Road Programme activity - that is all planned improvements estimated to cost more than £3m - into one office in Birmingham with responsibility for the preparation of motorway schemes, all construction work and technical services.
Preparation of trunk road schemes will be carried out in satellite offices in Bristol and Manchester.
The Southern office will have a team dealing with the south-west outstationed in Exeter.
These offices will be responsible for managing and maintaining the trunk road network and for new, smaller road schemes (under £3m).
Communications and lighting on the motorway and trunk road network will continue to be run from Bristol but the division will have a small team within the Directorate headquarters in London.
All new senior staff will be in place by 3 April. The rest of the reorganisation will be phased over the next six months with the new organisation in place by the end of September.