Specifications - Berlin Hauptbahnhof and North-South Tunnel, Germany

Key Data
City population	3.4 million (June 2006)
Ownership	Deutsche Bahn AG
Service Operators	DB Fernverkehr and DB Regio
Date opened	May 2006
Project lengths	Tunnel 3.4km (2.1 miles). Reinstatements on feeder lines with approx. 50 new route km (31 miles).
Gauge	1435mm (4ft 8½in)
Lines	ICE, IC and EC services
Traffic levels	Approximately 1,800 trains and 3,500 daily at Hbf.
Power System
	15 kV ac 16.7Hz, overhead supply
Special Characteristics
	Berlin Hbf is Europe’s largest non-terminus station interchange
	Environmental rules influence engineering and operation
	Completion needed a high level of technical innovation
	Continuing integration with current and planned urban transport modes
	Urban regeneration underpins two new commercial hubs