Photos taken on A280 Long Furlong show the road has been closed whilst emergency services work at the scene.
A lorry has seemingly left the road in the single-vehicle incident.
AA Traffic News has reported slow traffic, both ways from A27 Arundel Road (Angmering / Clapham junction) to Michelgrove Lane.
1. A280 incident
Photos taken on A280 Long Furlong show the road has been closed whilst emergency services work at the scene Photo: Eddie Mitchell
2. A280 incident
Photos taken on A280 Long Furlong show the road has been closed whilst emergency services work at the scene Photo: Eddie Mitchell
3. A280 incident
Photos taken on A280 Long Furlong show the road has been closed whilst emergency services work at the scene Photo: Eddie Mitchell