Grafenberg tunnel
| Grafenberg tunnel | ||||
|---|---|---|---|---|
| Official name | Grafenberg tunnel | |||
| use | Road tunnel | |||
| traffic connection | Bundesstrasse 29 | |||
| place | Schorndorf | |||
| length | 260 m | |||
| Number of tubes | 2 | |||
| construction | ||||
| Client | Federal Republic of Germany | |||
| building-costs | 11.2 million DM | |||
| start of building | 1994 | |||
| completion | 1997 | |||
| business | ||||
| release | July 1, 1997 | |||
| location | ||||
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| Coordinates | ||||
| East portal | 48 ° 49 ′ 3 ″ N , 9 ° 31 ′ 7 ″ E | |||
| West portal | 48 ° 48 ′ 56 " N , 9 ° 31 ′ 0" E | |||
Map with all coordinates: The Graf mountain tunnel in Rems-Murr in Baden-Württemberg is a 260 m long, twin-tube, in open construction erected tunnel highway-like national road 29 in the course of local bypass of Schorndorf . It pierces an eastern branch of the eponymous Grafenberg in the area of the Gipskeupers . Construction began in 1994. The structure was released on July 1, 1997 together with the Sünchen tunnel and the Schornbachtal viaduct . The construction costs for the tunnel amounted to DM 11.2 million at the time (in today's purchasing power € 7.8 million). In the years 2013 to 2015, the tunnel technology was successively renewed; as in the Sünchen tunnel, an outside light density measuring system was installed as a pilot project, which records the angle of incidence of the sun and light intensity and, if necessary, reduces the speed in the tunnel in order to prevent dazzling and thus rear-end collisions for road users .
Due to its short length, the tunnel does not need any fans. The maximum speed in the tunnel is 100 km / h.
swell
- ↑ data on autobahnatlas-online.de
- ↑ State Office for Geology, Raw Materials and Mining Baden-Württemberg: Geological map of the Swabian-Franconian Forest Nature Park 1:50,000. Freiburg im Breisgau 2001.
- ↑ Bright light slows down motorists from Waiblinger Kreiszeitung, April 25, 2015