Some motorists trapped overnight were caught in treacherous conditions on the M23 in Sussex and on the A23 in Kent
Here are the details of some of the roadworks planned in the South for the coming week.
Ryanair should have compensated passengers whose flights were cancelled because of volcanic ash in 2010, the EU's top court has found.
Delays on the A259 near Seaford. The road is blocked at the Seven Sisters Country Park.
One lane is closed on the M25 clockwise in Kent after junction 5 for the M26/A21. Congestion stretches to junction 4 for Orpington. It's due to an accident and is causing an additional travel time of 30 minutes.
A272 Cowfold Road is closed in both directions between A23 (Bolney Cross) and A281 (Village Hall roundabout) due to an accident involving a milk tanker. The road has been closed since 4am when the vehicle left the carriageway.
M3 Northbound exit slip road partially blocked, queueing traffic due to broken down vehicle at J9 A34 (Winnal Roundabout).
Two lanes closed due to accident on M3 Southbound between J11 A3090 / B3335 (Winchester South) and J12 A335 (Eastleigh). Matrix sign set to 40 mph.
M27 Westbound lane closed on exit slip road due to broken down vehicle at J8 A3024 (Bursledon/Hamble).
Two lanes closed due to incident on M3 Southbound between J8 A30 / A303 (Andover) and J9 A34 (Winnal Roundabout).
A33 Southbound closed due to serious accident, two motorcycles involved between M4 J11 / B3270 (Reading) and Mereoak Lane (Three Mile Cross).
One lane closed due to multi-vehicle accident on M20 coastbound at J4 A228 (Leybourne / Snodland).
A27 Eastbound closed due to serious accident, a single vehicle and a pedestrian involved between A285 Portfield Way / Chichester Bypass (Portfield Roundabout) and A285, congestion to B2145 Whyke Road (Kingsham Roundabout).