Vehicle Demand In Paris: Bicycles have passed cars as a means of transport in Paris according to a recent study, a city official said Thursday. Yet, it's happened," deputy mayor in charge of transport David Belliard posted on X. The study by the Institut Paris Region, an urban planning agency, found that Parisians opted for bicycles for 11.2% of their trips within the city itself, compared to only 4.3% for cars.