THE A12 is a crucial lifeline for many travelling motorists in and around North and mid Essex.

It’s used night and day by drivers and serves as a key route to reach many different places within the county.

It’s so well used that a multimillion-pound road surfacing scheme is still underway between junction 25 and junction 26, which started in October 2022.

There’s also a big £1.2billion plan to widen lanes of the A12 between Colchester and Chelmsford by building two major bypasses at Rivenhall End and between the Kelvedon north and Marks Tey turnings.

Busy - the A12Busy - the A12

So, with the A12 always being used, here’s a rundown of all the expected closures you can expect according to National Highways throughout July in effort to make your journey easier.

All the closures are due to works.

July 6

The A12 Southbound Junction 14 entry slip road is closed until 8pm.

On the A12 Southbound, the carriageway between junction 16 to junction 13 will be closed from 8pm until 5am the following day.

The A12 Northbound will have a carriageway closure between junction12 to junction 15 from 9pm until 5am on July 7.


July 7

A12 northbound Junction 13’s entry slip road will be closed from 9pm until 5am on July 8.


July 8

The carriageway between junction 12 to junction 15 of the A12 Northbound will be closed at 9pm until 5am, July 9.

Junction 21’s exit slip road will be closed from 8pm until 5am, July 9.


July 9

The A12 Northbound carriageway between junction 12 to junction 15 will be closed at 9pm to 5am on July 10.



A12 Southbound’s junction 25 exit slip road is still closed and won’t be reopen until July 20 at 6am.

The A12 Northbound junction 19 24-hour entry slip road closure has been in place since December last year and is expected to continue until October 23, 11.59pm.

This lengthy closure is due to construction of Network Rail’s new Chelmsford station, New Beaulieu Station.