This year there are three holidays in May, Labor Day on the 1st, Victory in WWII on the 8th and Ascension on the 29th. All these holidays give the French a chance to 'Faire le pont' - take a long weekend and can lead to moderate to heavy traffic.
Green - Normal Traffic
Orange - Moderate Traffic
Red - Heavy Traffic
Black - Very Heavy Traffic
Direction of Traffic
Depart - Leaving from urban areas going to vacation destinations.
Return - Coming back to urban areas from vacation destinations.