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Today Deutsche Bahn (German Railway) announced that normal traffic will resume on track next Saturday. About two thirds of the daily trains can be run. My educated guess is, the slab track is the reason why takes so long to get the second track repaired. On the high-speed line Cologne to Frankfurt four different systems were used. All have in common that prefabricated bi-block sleepers are vibrated into a in-situ concrete bearing plate: [url]https://www.researchgate.net/profile/Josef_Vican/publication/280876134/figure/fig1/AS:284600581541895@1444865474277/Slab-track-system-Rheda-2000-5.png[/url] The two yellow blocks connected by a lattice girde are the bi-block sleeper. The in-situ concrete needs a setting time which I can't determine without knowing the concrete (C30/37) recipe. But will be weeks not days. Regards, Volker
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