At first glance this station seems impossibly long - why the need for such a long platform if it is all fenced off? The answer lies in the past: this is not the original station of Gambetta. When it was decided to cut the Porte des Lilas branch line off, the existing Gambetta station was not in alignment with the proposed route. It was therefore decided to merge the existing station of Martin Nadaud into Gambetta and continue from there on. Therefore the fenced-off section is actually Martin Nadaud's old platforms.