With 30,000 passengers per day, Ermont-Eaubonne railway station is an important transit hub in the département of Val-d’Oise.
It is also one of the few stations in the Paris region “served by three different local lines (RER C plus Transilien lines H and J), and major two railway networks (terminating at Saint-Lazare and the Gare du Nord),” according to Intermodes. Planned works to transform Ermont-Eaubonne into a multimodal hub were launched in 2005, in order to cope with the increase in passenger numbers after the opening of a direct train to Saint-Lazare. In Ermont-Eaubonne, the original building, completed in 1878, had become too small to meet the growing transport demand. Costing 20 million euros – from a total budget of 196 million euros to build the Saint-Lazare link – the project yielded a number of developments, including a new bus station near the main building, a new passenger building and a reduction in the number of railroads. This phase of building works, completed in 2009, also featured the creation of a ZAC (joint-development zone) in order to rehabilitate the surrounding neighbourhood.