Investment Plan outlined to redevelop RER Line C in Paris, France April 23, 2024 | Europe Finance, Europe News, Finance, News Île-de-France Mobilités has laid out revised plans to redevelop RER Line C in Paris. Line C spans 176 km and features six branches. The current ridership is 540,000 passengers per day on a total of 54... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password