It follows a single vehicle collision
Traffic on approach to the incident queued for sometime.
For traffic approaching the closure locally a diversion route using local routes has been installed at J16 (B1007).
A strategic diversion route remains in place to assist with investigation work and recovery as follows;
Traffic is advised to leave the A12 at J15 (Webbs Farm A414 junction) and follow the A414 to the A414/A1114 roundabout.
At the roundabout take the second exit and onto the A414.
At the next roundabout take the first exit and continue on the A1016 to the A1016/A130 roundabout.
At the roundabout take the second exit and continue on the A130 to rejoin the A12 northbound at J19 Boreham Interchange.