A12 Chelmsford to A120 widening schemeRecently updated

Widening the A12 between junction 19 (Chelmsford) and junction 25 (A120 interchange)

Region:  East
Start date:  March 2020
Cost:  £100 to £250 million
Status:  PLANNED
Type:  Major Scheme
End date:  TBC

What impact will this have on my journey?

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Progress report

The consultation period is now closed for this scheme; we would like to thank you for your feedback on our proposals. We are now reviewing the responses and will produce a consultation report summarising the feedback received. We will complete our assessment work then refine the options, incorporating the comments provided where it is practical.

What next?

We expect to announce the preferred route for the scheme in summer 2017. In the meantime, we will be carrying out further environmental surveys to help determine protected species and local biodiversity over a wide survey area. We will identify and address flood plain issues and associated impacts as part of these works but as yet the specific details are unknown.

The environmental impact assessment will take into account the noise and pollution levels that may be realised and identifies mitigation measures which must be factored into any scheme that is proposed. It is important to note that the location of this survey work should not be taken as an indication of where any future route might run and does not reflect land on which the final scheme may be.

Following the preferred route announcement we will be carrying out a second consultation in autumn 2017; details of how you can take part will be published in due course.

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Date Event
March 2016  Feasibility assessment
December 2016  Identifying options
Spring 2017 Have your say
Summer 2017 Preferred route announcement
Summer 2018 Preliminary design
Summer 2019 Statutory process (including a second chance to have your say)
2020 Pre-construction preparation
2020 Start of works

Why we need this scheme

The A12 Chelmsford (junction 19) to A120 (junction 25) is part of the strategic road network and supports national and regional economy by connecting Felixstowe and Harwich ports to London. It links the towns of Chelmsford, Witham, Marks Tey and Colchester between junctions 19 and 25.

This road struggles to cope with existing peak traffic demands, resulting in delays and reduced speeds. With few available diversions, incidents and accidents result in disruption over a wide area.

Without intervention things will get much worse. Projected growth in population and local development will only increase the pressure on this road.

Essex County Council is leading a feasibility study for long term improvements to the A120 between Braintree and A12. For more information about the scheme, please visit the Essex County Council website.


With this scheme, we aim to:
  • reduce congestion and delays
  • increase road capacity
  • improve journey time reliability
  • supports the growth identified in Local Plans
  • improve safety
  • provide alternative access to local roads
  • help the transport network to better cope with road maintenance and with incidents such as collisions, breakdowns, maintenance
  • improve the environmental impact of transport on communities along the existing A12 route
  • reduce the impact of new infrastructure on the natural and built environment
  • provide improved routes between communities for cyclists, horse riders and pedestrians
  • reconnect communities
  • improve safe and effective access for public transport users
  • improve road user satisfaction

Project media files

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Project documents
A12 environmental study area | Map showing where environmental surveys are taking place for this stage of the scheme
Consultation brochure |
Newsletter |
Consultation executive summary |
Options assessment report |
Traffic data collection report |
A12 Third Forum presentation 25 November to 7 December 2016 |
A12 first forum presention 3 to 11 August 2016 |
A12 second forum presentation 16 to 29 September 2016 |
Project Control Framework quick reference guide |

Project timeline

Planned roadworks

Roadworks and Events for England

The latest incident information for England's motorway and trunk routes provided by Highways England

Location : The A12 southbound between the junctions with the A120 Colchester West and the A130 Chelmsford North. Lane Closures : Lane one is closed. Reason : Roadworks. Status : Currently Active. Period : expect disruption until 05:00 on 27 April 2017. Lanes Closed : There is one of two lanes closed.
Posted: April 26, 2017, 8:02 pm


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