Ile-de-France residents have been warned that it will be necessary to adapt their uses to relieve transport during the Olympic Games. Many lines will be overloaded, or even not recommended on certain days, at the risk of having to wait more than 15 minutes on crowded platforms before boarding the train.

“I'm very apprehensive because it's going to be an indescribable circus,” anticipates Arthur Poly, a 36-year-old teacher-researcher waiting for his metro.