RER A

RER A is a rapid transit line in the Réseau Express Régional (RER) system, which serves the Île-de-France region surrounding Paris, France. It connects central Paris to its eastern suburbs, specifically extending from the city center at Châtelet-Les Halles to destinations such as Marne-la-Vallée, which is notably near Disneyland Paris. The line is crucial for daily commuters and offers significant connectivity to various key sites, including business districts and tourist attractions. RER A operates trains that can travel both above and below ground, and it serves multiple stops along its route, facilitating access to the broader rapid transit network in the Paris metropolitan area.