There are more queues on A27 Lewes Road westbound between A27 and The Street (Arlington / Litlington turn off).
Delays are said to be easing, in Saltdean, on A259 Marine Drive westbound between Steyning Avenue and Arundel Drive West.
Meanwhile, in West Sussex, 'severe delays' have been reported on Crockhurst Hill eastbound between A27 Crockhurst Hill and A27 Upper Brighton Road. Average speed five mph.
There are also queues on A259 Brighton Road westbound between The Haven and A2025 South Street.
Queueing traffic has been reported on A24 London Road northbound before the Washington Roundabout.
In Chichester, there are reportedly delays on A27 eastbound between A27 (Emsworth Services) and A259 Cathedral Way (Fishbourne roundabout). Further delays are building on Whyke Roundabout eastbound between A27 Chichester Bypass and the Bognor Bridge Roundabout.