The free bus service started in September of 2018. Since then, there has been an increase in ridership, rising 57% during the week and 115% on weekends. In 2019, the figures that were available to Ubris were a 65% increase on weekdays and 125% on weekends from January through May.
From February through May, which coincided with Carnival, the figures rose even higher: a 72% increase during the week and 144% on the weekends. 48% of new bus users have indicated they use their cars less. In other words, they chose the free bus over driving their cars. Project Manager, Claire-Marine Javary of VIGS, also pointed out that, “When compared to the total number of users surveyed, 24% make bus journeys they used to make by car.”
https://cleantechnica.com/2019/10/07/a-french-city-introduces-free-public-transportation/