Traffic may be difficult on the 4th of November as the Marathon Nice Cannes will be done on that day. It will start from 8AM in Nice and will be done all along the beach up to Cannes.
One more difficulty for the traffic this year, there will be no train as the French railways has planned to stop the trains from the 1st to the 4th of November at 17h00. Here after the announcement from the French railways:
". Interruption of rail traffic between Cannes and Nice 1 to 4 November
Because of improvements to rail infrastructure, rail traffic will be completely interrupted between Nice and Cannes on Thursday 1st November 9:00 to 5:00 p.m. Sunday, November 4. We invite you to postpone your trip before November 1 or after November 4, 2012.