the line runs between Strasbourg and Paris via Saverne,Lorraine TGV,Meuse TGV,Champagne Ardnne TGV Paris Gare de Est the route is a High speed line and the route has 5 stations and the signaling french classic line signaling to the high speed line then the line is signaled from the TVM 430 signaling system the roling stock is TGV reasau and
You're forgetting German ICE3 trains the 406MF and 407 which are used for Frankfurt/Stuttgart-Paris services in addition to TGV 2N2. Speaking of the German ICE 3 DB 407 this video by Simply Railway will show what the inside of those look like
It's but adding in Metz Saarbrucken as a DLC to LGV Est will be complicated because French Trains need to deactivate KVB TVM-430 into the German Sifa LZB LZB Systems at the French-German Border. At the same time you're changing 25kv 50hz into 15kv 16.7hz AC overhead wires. SNCF trains capable of using those German signaling systems are TGV 2N2 X73900 TGV POS & the freight locomotive BB37000. https://upload.wikimedia.org/wikipedia/commons/6/62/SNCF_BB_37017_-_Cabine.jpg There you should be able to see PZB/LZB in addition to KVB. The reverse is that DB Trains like 185,181 406MF & DB Class 407 deactivate Sifa LZB PZB into French KVB & TVM-430 headed into France from Germany.