Press release

Overnight closures as M25 smart motorway upgrade continues

A section of the M25 will be closed for two nights next week, as work is carried out on overhead gantries as part of a project to upgrade the M25 to a smart motorway.


The clockwise M25 between junction 25 (near Waltham Cross) and junction 27 (where the road meets the M11) will be closed from midnight on Tuesday 16 September until 5.30am on Wednesday morning. Overnight on Wednesday, a similar closure will be in place on the anti-clockwise carriageway.

Clearly signed diversions will be in place via the A10, A406, and M11. Due to ongoing TfL tunnel works, a further short diversion from the A406 at Edmonton is also in place.

Nicola Cassidy, Assistant Project Manager said:

Transforming this section of the M25 into a Smart Motorway will add much needed extra capacity to this busy section of motorway by adding an extra lane and using technology to smooth out traffic flow and reduce frustrating stop-start congestion. These gantry upgrades are an important part of the project, and by carrying it out overnight we hope to keep disruption to a minimum.

Road users who are planning to use the M25 between Waltham Cross and the M11 are advised to plan ahead and leave extra time for their journeys. Live traffic information is available on the Highways Agency’s website and mobile app, and drivers can also listen to traffic bulletins on local radio for updates.

Further similar closures are planned in late October.

General enquiries

Members of the public should contact the Highways Agency Information Line on 0300 123 5000.

Media enquiries

Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.

Published 10 September 2014