A renewed strike by the German train drivers’ union GDL later this week will have a “massive impact” on operations, said state-owned rail operator Deutsche Bahn. Deutsche Bahn’s head of human resources, Martin Seiler, also criticized the GDL union’s announcement on Monday that it would no longer provide at least 48 hours’ notice of further strikes. “These so-called wave strikes are a sheer imposition for our passengers.” Because the train drivers’ union is not getting its maximum demands, it is striking again, said Seiler. “That’s stubborn and selfish. Many millions of people in our country ca…