Drivers should expect disruption both ways on the A27 near Lewes between junctions with the A2270 and the A26 South, according to Highways England. This is due to emergency roadworks and disruption is expected to continue until March 11.
The A27 at Polegate is reported to be moving slowly on all approaches due to traffic lights.
Traffic is reported to be queueing on the A27 at Lancing and Worthing and the A259 westbound between Peacehaven and Saltdean.
On the A21 between Hurst Green and Flimwell there are two sets of roadworks with temporary lights which are continuing to cause delays.