the section within the current borders of germany that connects berlin with the polish border near küstrin-kietz is now a largely single-track non-electrified main line, part of the tariff zone of the verkehrsverbund berlin-brandenburg (berlin-brandenburg transport association) and has been operated by niederbarnimer eisenbahn since 10 december 2006 with bombardier talent diesel multiple units. on 22 december 2006, the line speed was restored to 120 km/h between the 75.0 and 80.7 kilometre points for the first time in 60 years. this did not affect travel times or the timetable, but the change is considered a sign of an incipient upgrade of the eastern railway.