FlyerTalk Forums - View Single Post - What am I missing…RER B “Express” to CDG
Old Sep 27, 2023 | 9:16 am
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straniero
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Join Date: Jun 2011
Location: Paris
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you can find (in french) info on the upcoming works here
https://www.bonjour-ratp.fr/lignes-rer/ligne-b/travaux/

that said, sometimes the RER B just breaks. I think I had to take the replacement bus 5+ times since the beginning of the year.
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