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The B 23 starts at the B 472 (bypass Schongau - Peiting) exit Peiting-south in the Weilheim-Schongau district and initially leads to Rottenbuch. A few years ago, this stretch was in a poor state of development, during which some more serious accidents have occurred. In recent years, this segment has been widened.
After the main through-road of Rottenbuch reaches the line the “Echelsbacher Brücke”. The 183 m long and 76 m high arch bridge spanning the Ammer. On the bridge there is also the border of the district of Garmisch-Partenkirchen.
The road passes Bad Bayersoien and reaches Saulgrub. Currently, a local diversion around Saulgrub is being built to ease traffic congestion from through traffic. In Saulgrub, the B 23 meets the Ammergau Railway (Murnau / Oberammergau) for the first time.
It follows village Unterammergau. The road pass the local diversion of Oberammergau and reach Ettal. After the road cross the village, it achieve the “Ettaler Sattel” (869 NHN) the highest point on the route. The way winding along twisting road into Loisachtal. Here reaches the route Oberau and the Bundesstraße 2. The two roads run parallel to six kilometers (3.7 miles) towards the south. After the bypass Farchant separates the B 23 from the B 2 and runs in a southwesterly direction to Garmisch-Partenkirchen.
After B 23 has crossed Griesen, the route ends at the border with Austria (Tyrol), where it merges into the Austrian B 187 (towards Lermoos, Fernpassstraße, Inn valley).
History
Origins
Probably in the Roman period, but no later than at the time Louis IV, there was a connection between the Via Claudia in the Lech Valley to the Brenner road in the Loisach Valley.
The most difficult part of this route led from Rottenbuch to Bad Bayersoien by Echelsbach gorge. Therefore between 8 November 1928 and 27 April 1930 Echelsbacher Brücke was built for 900,000 ℛ︁ℳ︁.
Former routes and designations
The Bundesstraße 23 arise from Reichsstraße 23 at 1949. At that time, the R 23 began in Peiting at the intersection "Schongauer Straße" / "Oberere Straße" / "Guggenbergerstraße" at the then R 17 and ended in Oberau at the junction with the R 2. With the introduction of the Bundesstraßen the B 23 was extended on Farchant to Garmisch-Partenkirchen. There they led to the B 24.[1]
Alterations
The Local diversion Oberammergau opened to traffic in 1989.[2]
The extension of the route from Garmisch-Partenkirchen to the Austrian border at Griesen in 1991. The B 24 was integrate in the new B 23. The remainder in Garmisch-Partenkirchen municipality was downgraded.
In 1991, following the release a segment of the bypass Schongau - Peiting the beginning of the B 23 changed to B 17 exit Peiting-West. The main through-road of Peiting was downgraded to a state road (German: Staatsstraße). The relocation to the present location was made after completion of bypass Schongau - Peiting in 1997
^Historischer Verein Oberammergau 1999 e.V. "Geschichte der Gemeinde Oberammergau" [History of Oberammergau] (in German). Oberammergau. Archived from the original on 19 July 2011. Retrieved 24 July 2010.{{cite web}}: CS1 maint: numeric names: authors list (link)
^Brandner, Joseph. "Farchanter Ortschronik" [History from Farchant] (in German). Farchant: Tourist-Information Farchant. Archived from the original on 25 May 2010. Retrieved 24 July 2010. Im Mai 2000 wird der Farchanter Tunnel eröffnet – die Ortsumgehung entlastet täglichen Durchgangsverkehr.
^ abStaatliches Bauamt Weilheim. "Projekte aus dem Bereich Straßenbau" [Projects related to road construction] (in German). Weilheim. Retrieved 24 July 2010.
^Government of the Federal Republic of Germany (2 July 2003). "Bundesverkehrswegeplan 2003" [Federal Transport Infrastructure Plan 2003] (PDF) (in German). Berlin: Bundesministerium für Verkehr, Bau und Stadtentwicklung. Archived from the original(pdf–2393KByte) on 2011-07-16. Retrieved 24 July 2010.
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