Federal highway 172a

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Template: Infobox high-ranking street / Maintenance / DE-B
Federal highway 172a in Germany
Federal highway 172a
Basic data
Operator: GermanyGermany Federal Republic of Germany
Overall length: 4 km
  of which in planning: Pirna cross B172b0.5 km

State :

Development condition: 2/2
B172a Dohna (01) 2006-12-21.jpg
The B 172a near the junction with the A 17
Course of the road
Free State of Saxony
District of Saxon Switzerland-Eastern Ore Mountains
Template: AB / Maintenance / Empty Transition from S 178a
Start of expressway Beginning of the motor road
Junction (6)  Pirna A17 E55
node Pirna 172n
tunnel (120 m)  Pirna tunnel
Junction Pirna center B172
Continue on  S 177

The federal highway 172a is a German federal highway in the district of Saxon Switzerland-Eastern Ore Mountains .


The road was built in the course of the new construction of the A 17 between 2002 and 2004 as a four-lane motorway feeder for Pirna and measures a total of 5.2 km in length (3.6 km of which four-lane). The B 172a also forms part of the western bypass of Pirnas in connection with the state road S 177 over the Elbe . The transition from the B 172a to the S 177 takes place at the junction with the federal highway 172 .

The B 172a was built in the course of the urgent need in the Federal Transport Infrastructure Plan 2003 and relieves the B 172 running through the Elbe Valley . The construction costs amounted to approx. € 20.6 million.

Engineering structures

A 120 m long tunnel was built near the Pirna junction in the area of ​​Dippoldiswalder Strasse / Äußere Kohlbergstrasse for noise protection reasons .

Further planning

The DEGES currently planning starting from the B 172 the establishment of the Federal Highway 172N as a southern bypass of Pirna. The groundbreaking ceremony took place on August 3, 2017.

See also

Web links

Commons : Bundesstraße 172a  - collection of pictures, videos and audio files

Individual evidence

  1. Franz Werfel: Faster to Saxon Switzerland . In: sächsische.de . ( sächsische.de [accessed on November 23, 2018]).