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Autobahn

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The Autobahn is the federal controlled-access highway system in Germany.

Frankfurter Kreuz - BAB 3 und 5
Frankfurter Kreuz - BAB 3 und 5

While the word "autobahn" can mean any controlled highway in other languages, in English it refers specifically to this German network. The official name for the federal system is Bundesautobahn, which translates to "federal motorway." These roads are vital for moving people and goods across the country. They are designed for high-speed travel with specific construction standards. Most of these highways must have at least two lanes in each direction.

Bundesautobahn 5-FFM
Bundesautobahn 5-FFM

To maintain safety at high speeds, the Autobahn uses a specific design. The highways feature multiple lanes separated by a central barrier. Access is restricted to motor vehicles with a top speed higher than 60 km/h. Most exits are located on the right side of the road. In the past, these roads had narrow shoulders of about 2.5 meters. Engineers later retrofitted many right-hand shoulders to be 2.5 meters wide. This provides extra space for drivers to pull off the road safely. In the postwar era, builders used a thicker asphaltic concrete cross-section. This construction includes fully paved hard shoulders to support heavy traffic.

Speed regulation on the Autobahn is a unique feature of the system. Much of the network has no legal speed limit for certain vehicle classes. However, an advisory speed limit, or Richtgeschwindigkeit, of 130 km/h is posted.

Zeichen 393 - Informationstafel an Grenzübergangsstellen, StVO 2013
Zeichen 393 - Informationstafel an Grenzübergangsstellen, StVO 2013

While driving faster is not illegal, it can increase legal liability during a collision. German courts have ruled that an "ideal driver" would stay within the advisory limit. Speed limits are mandatory in urban areas, near construction, or in dangerous zones. A 2017 report showed that 70.4% of the network only has the advisory limit. Only 23.4% of the network has permanent speed limits.

Verkehrszeichen auf der Bundesautobahn 20090320 001
Verkehrszeichen auf der Bundesautobahn 20090320 001

The system uses a logical numbering scheme introduced in 1974.

Deutschland Autobahnen Nummerierung
Deutschland Autobahnen Nummerierung

Every road begins with the letter A for Autobahn. Single-digit numbers, like the A 8, identify main highways crossing the country.

Bundesautobahn 2 number
Bundesautobahn 2 number

Double-digit numbers, such as the A 24, represent regional highways. Three-digit numbers are used for very short local roads or ring roads. The numbering follows a specific geographic pattern. East-west routes are assigned even numbers. North-south routes are assigned odd numbers. North-south roads are numbered from west to east, meaning eastern roads have higher numbers. East-west roads are numbered from north to south.

The history of the Autobahn began during the Weimar Republic in the 1920s.

A private initiative called HaFraBa planned a car-only road from Hamburg to Basel. The first public road of this type opened in 1932 between Cologne and Bonn. This road is now known as the Bundesautobahn 555.

Bundesarchiv B 145 Bild-F088783-0003, Bei Bad Honnef, Ferienverkehr auf der A 3
Bundesarchiv B 145 Bild-F088783-0003, Bei Bad Honnef, Ferienverkehr auf der A 3

In 1933, the Nazi government launched a massive construction project called the Reichsautobahn. By 1936, the project employed 130,000 workers directly. Another 270,000 people worked in the supply chain for steel and concrete. The first section of this new system opened in 1935 between Frankfurt am Main and Darmstadt.

During World War II, the construction of the Autobahn changed significantly. As the war progressed, the system relied on forced workers and concentration camp inmates. Construction slowed drastically due to the demands of the war effort. By 1942, only 10% of the planned network was actually finished. Some median strips were even paved over to serve as auxiliary airstrips. Despite common myths, the roads were not primarily built for military use. Tanks could not use them effectively because their heavy tracks damaged the road surface. Additionally, most German military transport relied on trains to save scarce petrol.

After the war, the Autobahn underwent massive repairs and expansions. In West Germany, the government restarted construction programs during the 1950s. Some sections that were cut by the Iron Curtain were not finished until German reunification in 1990. In East Germany, a speed limit of 100 km/h was set in 1956. Today, the Autobahn remains a massive engineering achievement. In 2006, a six-lane section in Brandenburg saw average speeds of 150 km/h.

Coloring GPS Tracks According to Speed
Coloring GPS Tracks According to Speed

This demonstrates the high capacity and efficiency of the modern German highway system.

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🖼️ Images & Media (27)
File:Zeichen 330 - Autobahn, StVO 1992.svg
Zeichen 330 - Autobahn, StVO 1992.svg
File:Bundesautobahn 2 number.svg
Bundesautobahn 2 number.svg
File:Bundesautobahn_14_number.svg
Bundesautobahn_14_number.svg
File:Bundesautobahn_63_number.svg
Bundesautobahn_63_number.svg
File:Bundesautobahn_480_number.svg
Bundesautobahn_480_number.svg
File:Frankfurter Kreuz - BAB 3 und 5.jpg
Frankfurter Kreuz - BAB 3 und 5.jpg
File:Autobahn-A3-Flughafen-Rhein-Main-2013-Ffm-035.jpg
Autobahn-A3-Flughafen-Rhein-Main-2013-Ffm-035.jpg
File:Deutschland_Autobahnen_Nummerierung.svg
Deutschland_Autobahnen_Nummerierung.svg
File:Funkturm Berlin View 14.jpg
Funkturm Berlin View 14.jpg
File:Bundesarchiv Bild 183-H04560, Österreich, Reichsautobahn, Adolf Hitler, Spatenstich.jpg
Bundesarchiv Bild 183-H04560, Österreich,...
File:Bundesarchiv Bild 146-1979-025-30A, Reichsautobahn mit zwei KdF-Wagen.jpg
Bundesarchiv Bild 146-1979-025-30A,...
File:Polish Army 1945.jpg
Polish Army 1945.jpg

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