I assume the numbers represent times, but what do the columns mean? What are the 4-letter codes at the top of each column, and what do they stand for? I need a train to get me from Paris Nord to CDG 2, and I need to arrive at CDG 2 at or before 06h20.
How to read Paris RER train schedules.
Four letter codes tell you the stops / route it will make. Unintelligible for most of humanity. Only useful when you have the schedule in front of you or you've ridden the RER your entire life.