Major route closed with long delays expected
The A12 is closed in both directions following a multi-vehicle collision and a broken down vehicle.
National Highways said the route was shut between junction 29 (Ardleigh Crown Interchange) and junction 30 (Stratford St Mary) at just after 07:15 GMT.
It said Essex Police and Suffolk Police are "dealing with the incidents".
Long delays are expected and diversions have been put in place.
Follow Essex news on BBC Sounds, Facebook, Instagram and X.