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| A115 (Autobahn) | |
|---|---|
| Country | DEU |
| Route | 115 |
| Length km | 28 |
| Terminus a | Berlin-Zehlendorf |
| Terminus b | Potsdam |
| Cities | Berlin; Potsdam |
| Established | 1936 |
A115 (Autobahn) A115 is an autobahn-standard roadway connecting southwestern Berlin with Potsdam and linking central Berlin to the Bundesautobahn network. The route incorporates historic corridors that trace 20th-century German infrastructure, intersecting with major arterial roads and traversing urban districts, suburban boroughs, and protected landscapes. A115 functions as a regional connector, an access route to federal highways, and a tangible remnant of planning epochs from the Third Reich to reunified Germany.
The roadway begins near Berlin-Zehlendorf and proceeds southwest through the Steglitz-Zehlendorf district toward the Dahlemer Weg area before adopting an alignment adjacent to the Wannsee lake and the Grunewald forest. It intersects with the Bundesautobahn 100 corridor and provides access to the Bundesstraße 1 and Bundesstraße 2 corridors that feed into central Berlin. Leaving the city limits, the autobahn traverses the Teltow plain and approaches the Potsdam-Mittelmark region, entering Potsdam near the Bornstedt quarter and terminating where it merges with the Bundesautobahn 10 ring. Along its length the route runs near landmark sites such as Wannsee Conference House, Glienicke Bridge, Sanssouci Palace, and the Stölpchensee recreation areas.
Initial construction dates to the 1930s under projects initiated by the Reichsautobahn program, contemporaneous with works commissioned by figures associated with the Nazi Party leadership and agencies like the Reichsministerium für Verkehr. During the World War II period the roadway saw military logistics use and later suffered maintenance neglect during the postwar division of Germany and administration by the Soviet Union. After the erection of the Berlin Wall the corridor acquired strategic importance as a controlled transit link between West Berlin and Potsdam and was subject to checkpoints and bilateral accords involving Allied powers and the German Democratic Republic. Following German reunification the autobahn underwent modernization programs funded by the Bundesministerium für Verkehr und digitale Infrastruktur and regional authorities from Brandenburg and Berlin, including renovation phases coinciding with milestones such as the expansion of the Autobahn network and infrastructure investment initiatives during the 1990s and 2000s.
Key interchanges connect the route to metropolitan and regional arteries. Notable nodes include the junction with Bundesautobahn 100 serving inbound traffic to central Berlin-Mitte and the interchange with Bundesautobahn 10 forming part of the Berliner Ring. Exit zones provide access to districts and sites such as Wannsee, Dahlewitz, Nikolassee, Babelsberg, and the Glienicke Bridge crossing point to Potsdam-Babelsberg. The configuration of ramps, service areas, and collector-distributor lanes reflects successive planning layers influenced by agencies like the Autobahnmeisterei and regional transport authorities. Signage conventions adhere to standards promulgated by the Deutsches Institut für Normung and federal road directives enacted by the Bundesverkehrsministerium.
Traffic patterns on the route display commuter peaks driven by flows between Potsdam and employment centers in Berlin, with freight movements supplementing passenger automobiles. Periodic congestion occurs at interchange complexes serving Bundesautobahn 100 and during events at cultural venues such as Sanssouci Palace festivals and sporting fixtures in Olympiastadion when regional traffic management plans are activated by the Bundespolizei and local authorities. Modal interactions include connections with regional rail hubs like Berlin Nikolassee station and public transit nodes governed by the Verkehrsverbund Berlin-Brandenburg. Traffic monitoring employs systems from firms and institutions active in German road telemetry, in coordination with emergency services including Feuerwehr Berlin and Polizei Brandenburg.
The roadway's engineering reflects successive construction epochs: original 1930s concrete pavement techniques influenced by the Reichsautobahn specifications, postwar repairs under Soviet-era maintenance regimes, and modern retrofits using reinforced concrete, asphalt overlays, and noise-abatement barriers consistent with standards from the Forschungsgesellschaft Landschaftsentwicklung Landschaftsbau and DIN norms. Noteworthy projects included bridge rehabilitations near the Havel crossings, geotechnical work across the Teltow soils, and installation of drainage systems to protect adjacent cultural landscapes such as Neuer Garten. Contractors and consortia involved in major contracts have included firms from the German construction sector and engineering consultancies with portfolios overlapping works for the Bundesautobahn 10 and urban motorways in Hamburg, München, and Köln.
Beyond transport utility, the corridor occupies a place in cultural memory due to proximity to sites tied to 20th-century history, including the Wannsee Conference locale, memorials related to World War II, and Cold War-era crossings at the Glienicke Bridge known in espionage histories involving agencies like the CIA and KGB. The route features in heritage discussions conducted by bodies such as the Denkmalschutzbehörde and local museums in Potsdam and Berlin, and appears in works by historians focusing on German reunification and infrastructure. Conservation debates balance traffic needs with preservation of vistas toward Sanssouci and surrounding UNESCO-tier cultural landscapes, engaging stakeholders from municipal councils of Berlin and Potsdam to federal heritage institutions.
Category:Autobahns in Germany Category:Transport in Berlin Category:Transport in Brandenburg