Käferberg tunnel
Northern portal of the Käferberg Tunnel (to the right)
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| Overview | |
|---|---|
| Line | Zürich–Winterthur |
| Location | Zürich, Switzerland |
| Status | Active |
| Operation | |
| Opened | 1969 |
| Owner | Swiss Federal Railways |
| Operator | Swiss Federal Railways |
| Traffic | Rail |
| Character | Passenger and freight |
| Technical | |
| Length | 2,119 metres (6,952 ft) (before extension) |
| No. of tracks | 2 |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Electrified |
Overhead catenary 11 kV AC 16 2/3 Hz |
The Käferberg Tunnel (German: Käferbergtunnel) is a railway tunnel in the Swiss city of Zürich. The tunnel runs under the Käferberg hill from the western approaches to Zürich Hauptbahnhof to a portal to the south of Oerlikon station. It is 2,119 metres (6,952 ft) long and carries twin standard gauge (1,435 mm or 4 ft 8 1⁄2 in) tracks electrified at 11 kV AC 16 2/3 Hz using overhead catenary.
Heading south from the southern portal of the tunnel, the railway first crosses the River Limmat and Hardturmstrasse on a concrete viaduct. Still on viaduct the line splits into two, with the right hand leg being a single-track viaduct that descends into Zürich Altstetten station. The left hand leg, still double track and on viaduct, runs into the upper level of Zürich Hardbrücke station, before continuing its descent into the Hauptbahnhof.
The tunnel was opened in 1969. As built, only the Altstetten leg of the southern connecting lines existed, and the tunnel was only usable by freight and other trains that bypassed Hauptbahnhof station. In 1982, Hardbrücke station and its leg of the connecting lines opened, allowing the tunnel to be used by trains running between Hauptbahnhof and Oerlikon.
Today the tunnel carries Zürich S-Bahn lines S5, S6, S7, S9, S15, S16 and S21, all of which operate via Hardbrücke. It also carries freight traffic, which runs via the Altstetten link.
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