 These were designed for the long-term protection of the line, in particular the section beyond Usingen (including its possible later electrification), the maintenance of the through trains to and from Frankfurt, barrier-free interchange in Usingen and a coordinated operating concept including feeder buses.In mid-February, a cooperation agreement between the Verkehrsverband Hochtaunus and the Rhein-Main-Verkehrsverbund was concluded, after which the RMV promised to bear half of the planning costs of €4 million.The planning approval procedure would be initiated (according to the assessment at that time) in 2017 and the construction work would begin at the earliest in 2018.