Chichester Police warned of 'severe delays' after a collision closed part of the A27 this afternoon.
There was a large emergency response to the incident, with Hampshire Fire and Rescue Service crews, and SECAmb (South East Coast Ambulance Service) paramedics also on the scene at around 1.30pm.
In a post on social media, Chichester Police wrote: "ATeamChi are in attendance at a two-vehicle road traffic collision on the eastbound carriage way of the A27.
"Please avoid this area. #stayaway #roadclosed."
In another post, it added: "Severe delays expected."
The route was reportedly closed at the A259 Havant Bypass junction at Havant Road and Emsworth Road, but was re-opened as of 4pm.
SECAmb has been approached for comment.