Work to revamp busy M25 interchange with the A10 to start this week

Living Magazine Roadworks

Work to tackle congestion at the busy interchange between the M25 and A10 in Enfield starts this week.

Under the plans, junction 25 of the M25, where the motorway meets the A10 near Broxbourne will be reconfigured to improve traffic flow.

Junction 25 is a nationally and regionally important junction, and sees up to 6,300 vehicles per hour using the junction’s roundabout at peak times, causing congestion and regular delays. The A10 southbound approach into the junction is also a congestion hotspot in Broxbourne.

Improvements at this junction are essential. Research shows that if improvements aren’t carried out, by 2037 this junction would expect to see:

  • Increased congestion, longer queues and doubling of journey times
  • Reduction of average speeds through the junction by up to 30%
  • More widespread disruption following incidents
  • Future development and growth opportunities being more limited due to congestion
  • Uncontrolled deterioration to local air quality.

Highways England Project Manager, Indy Grewal, said: ‘We’ve been busy working on developing the design and construction plan since our last public information events in June 2019 where people’s feedback helped shape our approach to delivering the scheme.

‘Improving this junction will mean better journeys for the 6,300 drivers who use it every hour at peak times; it will also increase capacity and help to boost the economy. We are also launching virtual events where people can find out more about the scheme. I urge people to register and get involved.’

The enabling will include:

  • The diversion of a water main and phone lines
  • The installation of a site compound
  • Vegetation clearance

The main construction work will start in February and will continue until summer 2022. This will include the following:

  • Widening of the roundabout to include an additional lane
  • Addition of a free-flow left lane from the M25 west off slip road on to A10 north
  • Widening and extension of the M25 westbound off slip road
  • Widening of the M25 eastbound off slip road
  • Widening of the A10 southbound at the entry to the roundabout
  • Improvement on the existing subways and new shared use routes for pedestrian and cyclists.

To give people interested in the scheme the opportunity to find out more, Highways England are holding a virtual public information event online, where people will be able to read more about the project, watch a fly through video showing a visualisation of the scheme and ask questions on a live chat.

The virtual room will be open from 8am Monday 25 January 2021 and will remain available for the rest of scheme.

A live chat feature with the project team will be available as follows:

Monday 25 January 8am-12pm and 2pm-6pm
Friday 29 January 11am-3pm
Saturday 30 January 9am-12pm 

Updates on the scheme and access to the virtual public information event can be found: