RERFrench words: RER , Réseau Express Régionalalternative words: Regional Express Network, Paris suburban railway keywords: paris , paris suburb , transport related topics: Paris subway , SNCF , RATP related web sites: http://www.ratp.fr , http://idf.sncf.com , http://www.navily.net/histreranc.php explanation: Though there had existed already railroads which connected the suburbs to Paris before WWII, those lines belonged to different companies and badly interconnected between them So the government built in 1977 a public organisation, RER which would unified those scattered lines by completing lacking segments and electrifying them if necessary. There exist now 5 RER lines with an alphabet initial. The oldest is the line A which runs from west to east through Paris, followed by the line B, from north to south. | |