⁴ᴷ⁶⁰ Exploring the Paris RER System

The Réseau Express Régional, commonly abbreviated RER, is a hybrid commuter rail and rapid transit system, similar to the S-Bahns of German-speaking countries, serving Paris and its suburbs. It acts as a combined city-center underground rail system and suburbs-to-city-center commuter rail. In the city center, it is a faster counterpart of the Paris Métro, with fewer stops.
Conceived during the mid-1930s, the scheme was revived in the 1950s, and construction began in the early 1960s. The RER network, which initially comprised two lines, was formally inaugurated on 8 December 1977.
As of 2023, the network consists of five lines: A, B, C, D and E. The network has 257 stations and has interchanges with the Métro and commuter rail within the City of Paris and the suburbs. The lines are identified by letters to avoid confusion with the Métro lines, which are identified by numbers.
Enjoy this look at a world-class transit system!
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Taken in May 2024.