Brook Street Interchange

Brook Street Interchange is junction 28 of the M25 and junction 11 of the A12.

It was first built when Brentwood was bypassed in 1966, predating the M25, and the old A12 through Brentwood was re-numbered as the A1023.

The M25 viaduct was built over the top in 1981, finally opening in 1983 and linking the A12 to the motorway network. This junction was remodelled in March 2008 to signalise it and increase stacking space to cope with the large traffic flows using it, however delays persisted at the junction, so in November 2016, National Highways opened consultation on proposals for further improvements to the interchange. Work has now started on a freeflow loop from M25 anticlockwise to A12 NE bound.

It also serves as a crossing of the River Ingrebourne.

Routes

Route	To	Notes
M25	(M11, M1), Stansted Airport, Watford	E15 and E30
M25	(M20, M23), Dartford Crossing	E15
A12	London (E & C), Romford
A12	Chelmsford, Harwich (A120)	E30
A1023	Brentwood, Pilgrims Hatch, South Weald

Links

National Highways

• M25 J28 Consultation brochure  November 2016 (archive.org)

• Post Opening Project Evaluation - M25 J28 (A12 Brook Street Interchange) - Five Years After  October 2014 (archive.org)

legislation.gov.uk

• The M25 Junction 28 Development Consent Order 2022

• The M25 Junction 28 Development Consent (Correction) Order 2024 - corrections to the above