Heavy overnight rain has resulted in major flooding problems for motorists across West and Mid Sussex this morning (Friday January 17).
Sussex Police have advised drivers to be aware of the conditions and think carefully before taking to the roads.
The A23 is currently closed between Bolney and Pease Pottage, leading to extensive tailbacks, and long delays are expected southbound.
Although diversions have been set up, many other roads in the area have been closed or badly affected by flooding.
Affected roads include the A24 at Broadbridge Heath, Findon and Dial Post, the A29 at Bury Hill, near Pulborough, the A281 at Henfield and the A27 east of Chichester.
Police say some drivers have ignored warning signs or have got stuck after driving into water, adding to the difficulties.
Police have advised motorists to allow extra time for journeys, to be prepared to stop or find an alternative route and not to take chances if flooding is encountered.