There is queuing traffic both ways on the A27 Chichester Bypass between the Stockbridge and Fishbourne roundabouts.
Emergency roadworks with temporary lights will continue until tomorrow on the Upperton Road junction with Hurst Road.
There is queuing traffic on the A286 northbound and the A27 both ways between the Whyke and Bognor Bridge roundabouts.
In Hassocks, the A273 London Road is partly blocked due to an incident at the B2116 Keymer Road at the Stonepound Crossroads.
In Littlehampton, East Street is now clear following an incident earlier at the Flintstone Centre.
In Brighton, Upper Hollingdean Road is now clear following an incident earlier between Roedale Road and Ditchling Road.