There are three Bank holidays in May, Labor Day on the 1st, Victory in WWII on the 8th and Pentecost Monday on the 25th, the only holiday that lets the French 'Faire le pont'. Around these long weekends traffic is normally heavy. The long weekend starting on May 25th sees the heaviest traffic, with three national heavy traffic days.
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.