Translate the following English sentence to French:
"More than that, however, in anticipation of tangible results in future, the directive on the interoperability of high-speed routes has primarily made it possible to define and iron out working methods."
Mais au-delà, à défaut de résultats encore tangibles, la directive sur l'interopérabilité grande vitesse a surtout permis de définir et de roder une méthodologie de travail.