There is a timetable service to Marseille on LGV Méditerranée where you have to stop at Aix-en-Provence, but you have to wait for the other service (behind) to overtake (pass through non-stop). Do you know which one it is?
These are timetables service on LGV, where you get to see an AI overtake you or pass through Aix-en-Provence TGV non-stop: 12:02:00 TGV 6116 Paris Gare De Lyon 12:46:00 TGV 6109 Marseille-St-Charles (unless you wait for it) 14:00:00 TGV 6120 Paris Gare De Lyon (kind of) 17:00:00 TGV 6128 Paris Gare De Lyon (kind of) 17:49:00 TGV 6050 Lyon Part Dieu 19:09:00 TGV 6862 Lyon Part Dieu