Autobahn (pronounced [ˈaʊtoːbaːn] in IPA; is the German word for a major high-speed road restricted to motor vehicles and having full control of access, similar to a motorway or freeway in English-speaking countries.

In most countries, it usually refers to the German autobahn specifically. The "recommended speed" of the German autobahn is 130 km/h (80 mph). Austrian and Swiss autobahns have general speed limits of 130 km/h and 120 km/h (75 mph), respectively. In German, the word is pronounced as described above, and its plural is Autobahnen; in English, however, the segment "auto" is typically pronounced as in other English words such as "automobile". The official name of the autobahn in Germany is Bundesautobahn (BAB) (Federal Motorway). Autobahns are built and maintained by the federal government (as are the federal highways), thus the name "Federal Motorway". When first built in the 1930s the official name was "Reichsautobahn" (Imperial Motorway). There are roads of similar design built by the states. These belong to the system of federal highways and have the same yellow signs.



Similar to such freeways in other countries, autobahns have multiple lanes of traffic in each direction, separated by a central barrier with grade-separated junctions and access restricted to certain types of motor vehicles only. The first German autobahn was completed in 1931 between Cologne and Bonn [1]. Each carriageway was flanked by bankettes about 60 cm (2 ft) in width, constructed of varying materials; right-hand bankettes on many autobahns were later retrofitted to 120 cm (4 ft) in width when it was realized cars needed the additional space to pull off the autobahn safely. In the postwar years, a thicker asphaltic concrete cross-section with full paved hard shoulders came into general use. The top design speed was approximately 80 km/h (50 mph) in flat country but lower design speeds could be used in hilly or mountainous terrain. A flat-country autobahn constructed to published design standards in use during the Nazi period could support hands-off (banking of the roadway where the car would track straight, despite curvature of the road) speeds on curves of about 40 km/h (25 mph).

The current autobahn numbering system in use in Germany was introduced in 1974. All autobahns are named by using the capital letter "A" followed by a blank and a number (for example "A 8"). The "main autobahns" going all across Germany have a single digit number usually even-numbered for east-west routes and odd-numbered for north-south routes. Some roads may not be as easily distinguished as one or the other as they may be in the United States, for example, whose interstate highways follow routes that are clearly horizontal or vertical when viewed on a conventional map. Shorter autobahns that are of regional importance (e.g. connecting two major cities or regions within Germany) have a double digit number (e.g. A 24, connecting Berlin and Hamburg). The system is as follows:

  • A 10 to A 19 are in eastern Germany (Berlin, Saxony-Anhalt, parts of Saxony and Brandenburg)
  • A 20 to A 29 in northern and northeastern Germany
  • A 30 to A 39 in Lower Saxony (northwestern Germany)
  • A 40 to A 49 in the Rhine-Ruhr Area
  • A 50 to A 59 also in the Rhine-Ruhr Area
  • A 60 to A 69 in Rhineland-Palatinate, Saarland and Hesse
  • A 70 to A 79 in Thuringia, northern Bavaria and parts of Saxony
  • A 80 to A 89 in Baden-Württemberg
  • A 90 to A 99 in (southern) Bavaria

There are also very short autobahns, of local importance (such as beltways, or the A 555 from Cologne to Bonn). These usually have three numbers, the first one of which is similar to the system above, depending on the region.


In Switzerland, it is impractical to navigate using the autobahn numbers; instead it is useful to steer toward the largest city that lies in the intended target region; this is because traffic signs display the city names much more prominently than in Germany. In Switzerland, exits occur with greater frequency than in the other two nations.



The idea for the construction of the autobahn was first conceived during the days of the Weimar Republic, but apart from the AVUS in Berlin, construction was slow, and most projected sections did not progress much beyond the planning stage due to economic problems and a lack of political support. One project was the private initiative HaFraBa which planned a "car-only road" (the name autobahn was created in 1929) crossing Germany from Hamburg in the North via central Frankfurt am Main to Basel in Switzerland. Parts of the HaFraBa were completed in the 1930s and early 1940s, but construction eventually was halted by World War II.

Just days after the 1933 Nazi takeover, Adolf Hitler enthusiastically embraced an ambitious autobahn construction project and appointed Fritz Todt the Inspector General of German Road Construction. Soon, over 100,000 laborers worked at construction sites all over Germany. As well as providing employment and improved infrastructure, necessary for economic recovery efforts, the project was also a great success for propaganda purposes. It has been said that another aim of the autobahn project, beyond creating national unity and strengthening centralized rule, was to provide mobility for the movement of military forces. This, however, overlooks the fact that gradients on autobahns built before the war were far too steep for the goods vehicles of the time. The autobahn's main purpose, then, was to enable a large proportion of the population to drive long distances in their own cars, enjoying the countryside along the way. This explains some of the autobahn's routing (as at Irschenberg on the A 8 from Munich to Salzburg) which offers spectacular views but is impractical for today's heavy goods traffic.

The autobahns formed the first limited-access, high-speed road network in the world, with the first section from Frankfurt am Main to Darmstadt opening in 1935. This straight section was used for high speed record attempts by the Grand Prix racing teams of Mercedes-Benz and Auto Union until a fatal accident involving popular German race driver Bernd Rosemeyer in early 1938. A similar high speed section was built between Dessau and Halle.

During World War II, the central reservation of some autobahns were paved to allow their conversion into auxiliary airports. Aircraft were either concealed in numerous tunnels or camouflaged in nearby woods. However, for the most part, the autobahns were not militarily significant. Motor vehicles could not carry goods as quickly or in as much bulk as trains could, and the autobahns could not be used by tanks as their weight and caterpillar tracks tore up the roads' delicate surfaces. Furthermore, the general shortage of gasoline which Germany experienced during much of the war, as well as the relatively low number of trucks and motor vehicles badly needed for direct support of military operations, further decreased the attractiveness of autobahns for significant transport. As a result, most military and economic freight continued to be carried by rail. After the war, numerous sections of the autobahns were in bad shape, severely damaged by heavy Allied bombing and military demolition. As well, thousands of kilometers of autobahns remained unfinished, their construction brought to a halt by 1943 due to the increasing demands of the war effort.

In West Germany, following the war, most existing autobahns were soon repaired. During the 1950s, the West German government restarted the construction program; it continuously invested in new sections and in improvements to older ones. The finishing of the incomplete sections took longer, with some stretches being opened to traffic only in the 1980s. Some sections cut by the Iron Curtain in 1945 were only completed after German reunification in 1990. Finally, certain sections were never completed, as more advantageous routes were found. Some of these sections stretch across the landscape forming a unique type of modern ruin, often easily visible on satellite photographs.

The autobahns in East Germany (GDR) and the former German provinces of East Prussia, eastern Pomerania and Silesia in Poland and the Soviet Union after 1945 were grossly neglected in comparison to those in West Germany and Western Europe in general. They received minimal maintenance during the years of the Cold War. In many places only one side of the carrigeway is driveable, while the other had never received any maintenance since 1943. The speed limit on the GDR autobahns was 100 km/h (62 mph), however lower speed limits were frequently encountered due to the poor condition of the road surface, changing quickly in some instances. The speed limits on the GDR autobahns were rigorously enforced by the Volkspolizei, whose patrol cars were frequently encountered hiding under camouflage waiting for speeders. In the 1970s and 80s, the West German government paid millions of Deutsche Marks to the GDR for construction and maintenance of the transit autobahns between West Germany and West Berlin, although there were indications that the GDR diverted some of the earmarked maintenance funds for other purposes.


A short stretch of autobahn around the Lucerne area in 1955 created Switzerland's first autobahn. For Expo 1964, an autobahn was built between Lausanne and Geneva. The Bern-Lenzburg route was inaugurated in 1967.

Current densityEdit

Today, Germany's autobahn network has a total length of about 12,200 km (in 2005), which ranks as the third-longest in the world behind the Interstate Highway System of the United States and the National Trunk Highway System (NTHS) of the People's Republic of China.

The Swiss autobahn network has a total length of 1,638 km (as of 2000) and has, by an area of 41,290 km², also the one of the highest motorway densities in the world. The Swiss autobahn network has not yet been completed; priority has been given to the most important routes, especially the north-south and the east-west axes. The gaps in the autobahn network are apparent in the graphic.


Many sections of Germany's autobahns are modern, containing three lanes in addition to an emergency lane. Some other sections remain in their original state, with two lanes, no emergency lane, short ramps, etc. Such a combination of the two types of autobahn can be seen on the A 9 autobahn (Munich-Berlin). Heading out from Munich, the autobahn starts off as a modern, four lane in each direction + emergency lane autobahn. However, after heading into Thuringia, which was formerly part of East Germany, parts of the autobahn are no wider than two lanes and no emergency lane exists (only rare emergency bays with a telephone post in orange-yellow). Ongoing roadworks will eventually bring the entire A 9 to three-lane standard.


Swiss autobahns very often have an emergency lane except in tunnels. Some newly built autobahn sections, like the lone section crossing the Jura region in the north-western part of Switzerland, only have emergency bays. This may be due to the improved reliability of automobiles.

Speed limitsEdit

A hard limit is imposed on some vehicles:

60 km/h (37 mph)
  • Buses carrying standing passengers (except in Switzerland)
  • Motorcycles pulling trailers (in Switzerland: 80 km/h)
80 km/h (50 mph)
  • Vehicles with a gross weight rating (GWR) exceeding 3.5 t (except passenger cars)
  • Passenger cars and trucks with trailers
  • Buses or Coaches (in Switzerland: 120 km/h)
100 km/h (62 mph)
  • Vehicles with a gross weight rating (GWR) not exceeding 3.5 t pulling trailers certified for 100 km/h
  • Buses or Coaches certified for 100 km/h not pulling trailers


The German autobahns are famous for being some of the few public roads in the world without blanket speed limits for cars and motorcycles. Lack of blanket speed limits does not appear to negatively impact the road safety of autobahns compared with motorways in other countries; motorways are safer than other road types. Perhaps this is due in part because traffic can be heavy enough to restrict speeds to little above the typical motorway speeds found elsewhere. Certainly, speed limits do apply at junctions and other danger points, like sections under construction or in need of repair. Speed limits at non-construction sites are generally 100 km/h (62 mph), 120 km/h (75 mph), or sometimes even 130 km/h (81 mph); construction sites have a usual speed limit of 80 km/h (50 mph) but may be as low as 60 km/h (37 mph) or even 40 km/h (25 mph). Certain stretches have separate, and lower, speed limits used in cases of wet lanes. These stretches often feature an electronic speed limit signal that utilizes monitors mounted above the roadway. For example, if weather conditions worsen on a stretch of autobahn, the monitors above the roadway may signal a temporary speed limit.

Some limits were imposed to reduce pollution and noise. Limits can also be put into place temporarily through dynamic traffic guidance systems that display the according traffic signs. If there is no speed limit, the recommended speed limit is 130 km/h (81 mph), referred to in German as the Richtgeschwindigkeit; this speed is not a binding limit, but being involved in an accident at higher speeds can lead to being deemed at least partially responsible due to "increased operating danger" (Erhöhte Betriebsgefahr). The average speed traveled on the autobahn in unregulated areas by automobiles not regulated by other laws is about 150 km/h (93 mph). On average, about three fourths of the total length of the German autobahn network has no speed limit, about one fourth has a permanent limit, and the remaining parts have a temporary limit for a number of reasons.

In places without a general limit, there are mostly also no restrictions on overtaking, except for the Rechtsfahrgebot, a rule that requires drivers to use the right lane if possible and only pass other cars on their left, except when heavy traffic does not permit this. Therefore, those traveling at high speeds may regularly encounter trucks running side-by-side at only about 80 km/h (50 mph). In theory, trucks are not allowed to overtake others unless they drive 20 km/h (12 mph) faster than whomever they are overtaking, but truck drivers are generally under pressure to arrive in time, and such laws are rarely enforced for economic and political reasons, as many trucks are from foreign countries. The right lane of a typical autobahn is often crowded with trucks, and often, trucks pull out to overtake. Due to size and speed this is often referred to as 'Elefantenrennen' (Elephant Race). In some zones with only two lanes in both directions there is no speed limit, but a special overtaking restriction for trucks and/or cars pulling trailers. (An exception is Sundays, on which trucks usually are not allowed to drive, except for trucks with perishable goods and certain other exceptions.)

Many modern cars are capable of speeds of over 200 km/h (124 mph), and most large manufacturers of luxury cars follow a gentlemen's agreement by artificially limiting the top speed of their cars to 250 km/h (155 mph) for safety reasons (inexperienced drivers and risk of tires failing, especially when underinflated). Yet, these limiters can easily be defeated, so speeds exceeding 300 km/h (186 mph) are not unheard of, although due to common speed limits and other traffic, such speeds are rarely attainable.

Vehicles unable to attain speeds in excess of 60 km/h (37 mph) are not allowed to use the autobahn. Though this limit is not high for most modern vehicles, it prevents very small cars (e.g. Quads) and motor-scooters (e.g. Mofas) from using autobahns. To comply with this limit, several heavy-duty trucks in Germany (e.g. for carrying tanks or cranes) have a design speed of 62 km/h (usually denoted by a round black-on-white sign with "62" on it).

Accident RecordEdit

The overall safety record of autobahns is comparable to other European motorways, and motorways are safer than other road types. A 2005 study by the Federal Minister of the Interior indicated that there were an equal number of accidents per kilometer on the autobahn in sections without any speed limits.

Public debateEdit

Since the mid-1980s, when environmental issues gained importance and recognition among lawmakers, interest groups and the general public, there has been an ongoing debate on whether or not a nationwide general speed limit should be imposed for autobahns. Typically a car's fuel consumption increases with speed, and fuel conservation is a key factor in reducing pollution. Safety issues have been cited as well with regards to speed-related fatalities. The opposition to a general speed limit maintain that such regulation is unnecessary because only two percent of all German roads would be affected and because better fuel economy even at high speeds has been achieved in most modern cars. Moreover, recent accident statistics supposedly don't lend proof that traveling at high speeds is that much more dangerous.

Twenty years after the beginning of this debate, there are no plans by the federal government concerning such a speed limit.

In the discussion about such plans during his political term of office, the former Bundeskanzler Gerhard Schröder called the Germans "Autofahrernation" (a nation of drivers) to point out the fact that a speed limit would not be generally accepted by the public.

Toll requirementsEdit


A recent development involves the introduction on January 1, 2005 of mandatory tolls (Mautpflicht) for heavy trucks (weighing 12 metric tons or more) while using the German autobahn system. The German government contracted with a private company, Toll Collect GmbH, to operate the toll collection system, which involves the use of vehicle-mounted transponders and roadway-mounted sensors installed throughout Germany. The introduction of this system experienced several technical delays resulting in the loss of millions of Euros in potential revenue to the government. One result of the new toll policy has been an increase in heavy truck traffic on regular highways (Bundesstraßen and Landstraßen) in order to avoid paying tolls. There have been recent discussions about extending the toll requirement to include passenger cars, however this has proven so far to be very unpopular with a majority of the public and politicians of the major parties have denied they are considering such measures.

Austria and SwitzerlandEdit

Both the Swiss and Austrian autobahn systems require the purchase of a vignette (toll sticker) for passenger cars in order to use their respective roadways. But there is also the possibility of some routes where you have to pay an extra toll in case of more expensive cost of preservation by the autobahn-company (e.g. tunnels or high alpine autobahns). The Swiss vignette is offered only as an annual toll sticker, while the Austrians offer their vignettes in varying lengths of validity (10 days, 2 months or a year).

Since 2005 trucks travelling on Austrian autobahns are required to have a Go-Box, a little white box which counts the length of the used autobahn with electrical control points. The Go-Box is queried by overhead DSRC microwave radio transceivers at each exit. As only trucks need to carry a Go-Box, overhead 3-D infrared laser scanners are used to detect and photograph trucks without Go-Box.

In Switzerland a similar system is in use, using a box called "Tripon". Different to Austria and Germany, trucks are obligated to pay toll (Leistungsabhängige Schwerverkehrsabgabe (LSVA) (Power-dependent heavy traffic toll)) for every use of Swiss roads (also on regular highways and local roads).

Traffic laws and enforcementEdit

The German autobahn network is patrolled by unmarked police cars and motorcycles equipped with video cameras. This practice allows the enforcement of laws (tailgating, for example) which are often viewed in other countries as difficult to prove in court. Notable laws include the following:

  • Autobahns in Austria and Germany may only be used by powered vehicles that are designed to achieve a maximum speed exceeding 60 km/h (Switzerland: 80 km/h).
  • The right lane must be used when it is free, (Rechtsfahrgebot) and the left lane is generally intended for passing maneuvers only. Drivers using the left lane when the other lanes are free may be fined by autobahn police.
  • Overtaking on the right (Undertaking) is forbidden, except in traffic jams where it may be practiced with caution. The fact that the car overtaken is illegally occupying the left-hand lane is not an acceptable excuse. In these cases the police will routinely stop and fine both drivers.
  • In case of a traffic accident, the drivers must form an emergency lane to guarantee that emergency services can reach the scene of the accident. This lane must be formed between the left lane and the lane next to the left lane (i.e. between the two leftmost lanes).
  • It is unlawful for a driver to stop their vehicle on the road for any reason except in an emergency or situations where stopping is unavoidable, such as being involved in a collision. This includes stopping on emergency lanes. Running out of fuel is considered preventable and is consequently fined.
  • It is also unlawful to turn around or back up on the Autobahn under any circumstances.
  • The distance between vehicles (in meters) should be at least half the speed (in km/h) at all times (e.g. at least 60 meters at 120 km/h). This corresponds to a "lead time" of just under 2 seconds. As a reference: the white-and-black reflection posts to the right have a distance of 50 m to each other. Again, the fact that the car in front is illegally occupying the left-hand lane when the right-hand lane is free does not excuse following too closely.
    Fines for tailgating were increased in May 2006. At speeds of over 100 km/h, keeping less than 30 percent of the recommended distance now results in a suspension of one's driver's license for one to three months.
  • Due to legal regulations (Straßenverkehrsordnung) you are allowed to honk and flash headlights (Lichthupe) in order to indicate your intention of overtaking.[2],Proper distance to the vehicle in front must be maintained. Driving at insufficient distances, even when flashing ones headlights, is illegal.
  • The tires must be approved for the vehicle's top speed. Tires for lower speeds (i.e. cheaper than high-speed tires) are only allowed, if they are marked as Winter tires (M+S or M/S). In this case, the driver must have a sticker in the cockpit reminding of the maximum speed.


  1. German Myth 8 Hitler and the autobahn
  2. § 5 (5) StVO

See alsoEdit


  • Reichsautobahn (documentary/b&w) by Hartmut Bitomsky (West Germany, 1986)

External linksEdit

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