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The Project Control Framework
This framework sets out how we, together with the Department for Transport, manage and deliver major road improvement projects.
M25 Jct 12 to 15 Widening
M25 Jct 12 to 15 Widening
- Status
- Completed
- Located in
- Area 5

- Scheme type
- Programme of Major Schemes

The Project
The M25 Junctions 12 - 15 Widening project is now complete.
The project was completed ahead of schedule on the 28 November 2005. The Right Honourable Alistair Darling MP, Secretary of State for Transport, attended a completion ceremony on Tuesday 13 December to unveil a commemorative plaque to mark this occasion.
The motorway is now running at 5 lanes in each direction between Junctions 12 - 14 and 6 lanes in each direction between Junctions 14 and 15. Improvements have been made to both Junctions 13 and 14. This section of motorway is now running at the national speed limit subject to the variable speed limits in operation.
Five Year After study
As part of our ongoing programme of Post Opening Project Evaluation (POPE) this scheme has been reviewed at one and five years after opening. The studies compare the outturn effects of this scheme to the predicted impacts. A summary of the five year after report is available to download here: M25 Jct 12 to 15 Widening Summary Report (PDF 52KB)
A full version of the report is available to download here:




