For the events at CHAMROUSSE, AUTRANS and SAINT-NIZIER, certain sections of the road were converted for one-way traffic, as the road network allowed the return journey by another route. This meant that the empty 'buses could wait by the roadside until the spectators returned, and also that other vehicles could overtake, even without visibility. This greatly improved traffic conditions.

On 18th February about 150 'buses were able to make two round trips to Saint-Nizier. The transport of spectators is resumed in the following table, with, in the other column, the details of the busiest day (18th February).