Page "Gare de Châtelet – Les Halles" Paragraph 6

The tracks of the three RER lines are all oriented parallel in an east-west direction.

The seven tracks are grouped on four platforms.

Both central platforms are reserved for Line D. The benefit is that same-direction connections between RER A and RER B can be made on the same platform as the destinations, and that RER D trains which terminate at Châtelet – Les Halles can use the centre track.

Line A ’ s track towards Gare de Lyon and Line B ’ s track to Saint-Michel are both located on the north platform.

Conversely, Line B to the Gare du Nord and Line A towards Auber are both located on the south platform.

While the tracks of Line B run parallel to those of Line D, the tracks of Line A are located on the north and south.

On each platform, the trains travel in the same direction.

For example, trains to Gare de Nord run east-west and those towards Saint-Michel run west-east.