A three car crash has partially blocked the A24 Worthing Road Southbound at the West Grinstead turn off, the AA said. Traffic is queuing southbound.
There are delays of three minutes and increasing on Stockbridge Roundabout Westbound between A27 Chichester By-Pass and A27.
Severe delays of eleven minutes and delays easing are also being reported on the A27 Old Shoreham Road Westbound between A270 Upper Shoreham Road (Southwick / Holmbush turn off) and the A2025 Grinstead Lane (Sompting Roundabout).
There are also delays of two minutes on A27 Old Shoreham Road Eastbound between Manor Road and Hoe Court.
Delays of three minutes and increasing are being reported on the A27 Ranscombe Hill Eastbound in East Sussex
And there are delays of six minutes and increasing on A21 Sedlescombe Road North Southbound between Bluemans Lane and John Macadam Way.