HS2 M25 temporary slip roads

Scott Gaskin

Works to construct two temporary slip roads onto the M25 between junction 16 (M40) and junction 17 (Gerrards Cross). This work is for High Speed 2 Limited to access planned site compounds for construction of the Chiltern Tunnel and Colne Valley Viaduct.

There are narrow lanes and a 50 mph speed restriction on the clockwise carriageway to provide safe access to the west of the site from the M25. Construction work is expected to run until Summer/Autumn 2018.

The slip roads, once constructed, are for HS2 construction traffic use only and will be in place for 8 to 10 years duration.