Oh RER B...How do I hate you...? Let me count the ways....
1/
"This train will serve Roissy-Aeroport Charles de Gaulle"
"This train will terminate here. To continue to Roissy-Aeroport Charles de Gaulle, please descend one flight of stairs and ascend another flight of stairs to track 4.
"The train on track 4 is leaving in 2 minutes.
"The next train to Roissy-Aeroport Charles de Gaulle will depart from this track in.... 22....minutes.
Do the managers of the RATP own stock in UBER?