The Tour de France is the largest open access sporting event each year with up to 12 million people lining the roads annually, and its that very openness which is giving organisers sleepless nights.
This year, due to the ongoing threat of terrorism in France, measures have been reinforced along the 3500km route of the 2 - 14 July race.
The Tour will deploy 23000 gendarmes and police officers, with a crack squad from the elite special forces (National Gendarmerie Intervention Group) brought in for added security.
"It's our collective responsibility to ensure the safety of the spectators of the Tour de France," Interior Minister Bernard Cazeneuve said on Tuesday.
France has been under a state of emergency since the last Paris attacks on 13 November that left 130 people dead in the French capital.
"Everyone understands that this year the Tour de France is taking place in a particular context," Cazeneuve said.