Roadworks and lane closures

A12

3 closures6 booked

3 closures in force on the A12 right now. National Highways has 6 closures booked in the next 24 hours, the first due from 9pm, so it may already be in place.

Closed right now

Closure data updated 00:22 today2026-10-20T23:22:24.730Z

A12 southbound Jct 25 lane 3 and 2 closure (MP 156/2)

1 lane

A12 southbound between A1124 and A120 near Colchester (west)

20 Oct 2026 to 21 Oct 2026 · 2 lanes closed, Roadworks · 2 separate phases

A12 northbound Jct 29 entry slip carriageway closure

A12 northbound access from A120 near Colchester (east) and 9 more sections

20 Oct 2026 to 21 Oct 2026 · Road fully closed, Maintenance work · 2 separate phases

A12 northbound Jct 19 exit slip road closure

A12 northbound exit for A138/A130

20 Oct 2026 to 21 Oct 2026 · Slip road closed, Road maintenance

Booked for today and tonight

Next 24 hours, UK time

UK time. Dark bar: the road is fully closed, so expect a diversion. Lighter bar: lanes or a slip road closed, the road stays open.

A12 Both directions Old London Road carriageway closure

Due now

A12 northbound between B1024 near Kelvedon (north) and A120 near Colchester (west)

What: Road fully closed
Why: Roadworks
When: 9pm yesterday to 5am today (UK time)
Start time has passed, so it may already be in place
Also: Both directions

A12 southbound Jct 12 exit slip lane 2 closure

Due now

A12 southbound between B1002 and A1023

What: 1 lane of the slip road closed
Why: Road maintenance
When: 9pm yesterday to 5am today (UK time)
Start time has passed, so it may already be in place

A12 northbound Jct 17 to Jct 23 mobile lane closures

Due now

A12 northbound between A1114/A130 and A414 near Chelmsford (east)

What: 1 lane closed
Why: Tree and vegetation cutting
When: 9pm yesterday to 5am today (UK time)
Start time has passed, so it may already be in place
Also: Moving works (the closure travels along the road)

A12 northbound Jct 29 to Jct 33 mobile lane closures

Due now

A12 northbound within the B1070 junction

What: 1 lane closed
Why: Tree and vegetation cutting
When: 9pm yesterday to 5am today (UK time)
Start time has passed, so it may already be in place
Also: Moving works (the closure travels along the road)

A12 northbound Jct 23 to Jct 29 mobile lane closure

Due now

A12 northbound between B1024 near Kelvedon (north) and A120 near Colchester (west)

What: 1 lane closed
Why: Tree and vegetation cutting
When: 9pm yesterday to 5am today (UK time)
Start time has passed, so it may already be in place
Also: Moving works (the closure travels along the road)

A12 southbound Jct 25 lane 3 and 2 closure (MP 156/2)

Due now

A12 southbound between A1124 and A120 near Colchester (west)

What: 2 lanes closed
Why: Roadworks
When: 9pm yesterday to 5:01am today (UK time)
Start time has passed, so it may already be in place

These are closures National Highways has scheduled, mostly overnight. Plans can change on the night, and a closure only shows above as in force once our last check has seen it set up, so one that has passed its start time may already be in place.

Questions about the A12

Is the A12 closed right now?

3 closures were in force at our last check of the National Highways feed (12:22am today, UK time): A12 southbound Jct 25 lane 3 and 2 closure (MP 156/2); A12 northbound Jct 29 entry slip carriageway closure; and A12 northbound Jct 19 exit slip road closure. This covers planned roadworks and lane closures, not accidents.

Is the A12 closed tonight?

National Highways has 6 closures booked on the A12 in the next 24 hours, the first due from 9pm, so it may already be in place: A12 Both directions Old London Road carriageway closure; A12 southbound Jct 12 exit slip lane 2 closure; and A12 northbound Jct 17 to Jct 23 mobile lane closures, plus 3 more. Plans can change on the night.