 The current considerations and investigations envisage the electrification of the line to Usingen at the end of 2022 and the extension of S-Bahn line S5 services over this section.This would allow the existing class 423 sets would be used—which would create no additional costs—but new vehicles would need to be procured for electrical operations to Grävenwiesbach.This would have to be done before the start of the upcoming call for tenders for the operation of rail services.