Translate the following English sentence to French:
"I am referring specifically to the Spanish rail gauge, which, since this is a problem affecting the basic railway structure, we believe would involve a costly and slow renovation, and its particular circumstances need to be taken into account."
Ce problème concernant la structure ferroviaire de base, sa rénovation est coûteuse et lente. Nous considérons donc que nous devrions traiter cette rénovation en tenant compte de ses spécificités.