I think that German should build a High speed railway with 300km/h from Ludwigshafen hbf-Kaiserslautern hbf-Saarbrücken hbf attach to the France border
Did you have a look at a map of Rheinland Pfalz? Good luck building a high speed track from Neustadt to Kaiserslautern. You’d need to cut straight through the Pfälzer Wald (Palatinate forest).
