M25 and A2 Widening

Scheme outline

Works to widen the M25 to dual four-lane carriageways between junction 1B and the A2. The A2 will be widened from dual three to dual four-lane carriageways between the M25 and Bean, where previous widening works finished. New direct sliproads will be added to the A2/M25 interchange between the northern and eastern arms.

This scheme was completed in and we're no longer accepting updates or changes to this page.

Other upgrade
with parts under motorway restrictions
Highway authority
Central Government


14 December 2005

Costain are announced as the contractor for the scheme and work will start on the A2 and A282 widening in early 2006. Some public consultation is still necessary before the M25 widening can begin later in 2006.

14 March 2006

Work is now under way at the M25/A2 interchange, with trees felled and some earthworks taking place. The line of two or three sliproads are already evident.

14 August 2006

Signs have appeared on the M2 warning of delays from September 2006 - so that looks like the probable start date.

14 October 2006

Roadworks are now underway, with narrow lanes on the M25 during construction of the flyover.

14 January 2007

Narrow lanes are also in place on the A2, any bridge piers for the new flyovers at the junction are visible.

14 March 2007

Widening work on the A2 is now underway, and a steel structure is in place across the A2 for a future flyover.

14 April 2007

Works continue and a 'SPECS' average speed camera system has been installed through the extensive work area on both M25 and A2.

14 September 2007

The M25/A2 interchange is currently something of a mess, though the new flyovers are beginning to take shape. Realignment work is taking place on the A2 further east, including realignment about 100m to the south of the existing line.

14 October 2007

Work is now running six months ahead of schedule. Various new bridges are finished and ready for use.

14 January 2008

The junction works at the A2/M25 interchange have now formally opened, with free-flowing links between the A2 and the A282 to the north. Work continues at an advanced stage on the A2 widening and M25 widening projects.

More information