That was considered. A study was commissioned and concluded [1] against for several reasons : - the projected impact on car use was negligible (around 2%) ; -

That was considered. A study was commissioned and concluded [1] against for several reasons : - the projected impact on car use was negligible (around 2%) ; - the projected increase in the number of users (between 6% and 10%) is above the current infrastructure capacity ; - the new cost (3.3 billions euros) would be mainly supported by the Paris agglomeration inhabitants through their taxes rather than spread on all users ; - it's already free for the poorest and heavily subsidised for most of the local. [1] https://www.iledefrance-mobilites.fr/actualites/conclusions-de-letude-menee-sur-la-faisabilite-de-la-gratuite-des-transports-en-commun-en-ile-de-france-leur-financement-et-la-politique-de-tarification/ https://www.iledefrance-mobilites.fr/actualites/conclusions-...