Gray wood tunnel
| Gray wood tunnel | ||||
|---|---|---|---|---|
 East portal
|
||||
| use | Railway tunnel | |||
| traffic connection | Railway line Olten – Bern | |||
| length | 6295 m | |||
| Number of tubes | 1 | |||
| construction | ||||
| completion | 1995 | |||
| business | ||||
| operator | SBB | |||
| location | ||||
|
||||
| Coordinates | ||||
| East portal | 606296 / 208153 | |||
| West portal | 602062 / 203938 | |||
Map with all coordinates: The gray wood tunnel is a 6,295 meter long, double-lane railway tunnel northeast of the city of Bern and part of the gray wood line of the Swiss Federal Railways (SBB) opened in 1995 .
The Grauholzlinie (more rarely referred to as the new Löchligut – Mattstetten line ) is part of the Olten – Bern line . The line relieves the bottleneck Bern- Zollikofen of the main lines to Burgdorf and Biel . It starts at the cross-free junction with Löchligut and then goes into the gray wood tunnel. At the other end, between 1995 and 2004, it led back to the main line Bern – Olten near Mattstetten. Since 2004 there has been the crossing-free Äspli junction , which leads straight to the new Mattstetten – Rothrist line.
The tunnel lies in a curve along its entire length, forming an "S".
It passes under the historical, wooded ridge of the Grauholz , where in 1798 the Bernese defenders had to surrender to the French troops, which shortly afterwards took the city of Bern.