The A12 is closed in both directions following a crash.

The one vehicle incident has taken place between junctions 18 (Sandon) and 19 (Boreham Interchange).

Update: 3.45pm

The crash has involved a vehicle and a pedestrian.

Update: 4.45pm

The northbound carriageway has now reopened. Delays to J16 (Galleywood/B1007).

One lane remains closed between J19 (Boreham/A138) and J18 (Sandon/A414).

There are queues back to J21 (Witham South/B1389).

Many Chelmsford roads, including Baddow Bypass, Van Diemans Road (A1114), Baddow Road (B1009) towards the Army & Navy, are all slow moving as a result.