According to SBB predictions, it will double once more between 2010 and 2030, increasing from 50,000 to 100,000 passengers.

To be sustainable, SBB's response to the population's mobility requirements called for a large-scale project.

Within this context, the cantons of Vaud and Geneva, the Federal Office of Transport (FOT) and SBB have a common objective – to double the seating capacity of services between Lausanne and Geneva and provide quarter-hourly Vaud and France-Vaud-Geneva RER services by 2030. The implementation of these objectives depends not only upon investment in new rolling stock, but also infrastructure development. Lausanne and Geneva stations, which are currently saturated at rush hour, will see considerable changes, with new access and transit structures and also new commercial services.