Cologne Beltway

The Cologne Beltway (German:''Kölner Autobahnring'') is the collective term for the Autobahns encircling Cologne. It consists of the Bundesautobahn 1, the Bundesautobahn 3 and the Bundesautobahn 4. Segments of the beltway handle the highest traffic volume in Germany.

The Autobahns on the beltway cross Bundesautobahn 559, Bundesautobahn 555 and Bundesautobahn 57. The Bundesautobahn 59 is tied to the beltway at the interchange Leverkusen-West in the north and to ''Dreieck'' Heumar in the south.

History

The beltway was constructed in a clockwise fashion beginning at Leverkusen. In 1936 the section between Leverkusen and Cologne-Mülheim was built as a component of the Autobahn Oberhausen-Wiesbaden and in 1937 the section to Siegburg was finished. Thus today's ''Ostring'' (East-Ring) was drivable at that time. In 1941, the ''Rodenkirchener Autobahnbrücke'' was completed and the connection between the A 3 and the Autobahn to Bonn (today A 555) was established.

From 1957 to 1960 the Autobahn Cologne-Aachen was finished and the section from ''Kreuz Köln-Süd'' to the later ''Kreuz Köln-West'' was put into service in 1958. Construction of a second ''Autobahn''-bridge across the Rhine in the north of Cologne began in 1961. At its completion, the beltway could be used along its entire length.

In 1971, the A 1 was extended to the south beyond the ''Köln-West'' interchange and in 1974 the A 4 was connected to the A 3 from the east at the ''Köln-Ost'' interchange. Since then, the section between interchanges ''Kreuz Köln-Ost'' and ''Dreieck Heumar'' consists of two Autobahns, the A 3 and the A 4.

Current state

Traffic volume on the Cologne Beltway has been increasing continuously since the 1950s. All sections have since been expanded to three lanes in each direction, but since more than 180,000 cars use at least part of the Autobahnring every day, traffic jams are a frequent occurrence.
The section between the interchanges ''Kreuz Köln-Ost'' and ''Dreieck Heumar'' was expanded to four lanes in each direction in 2005, a first for North Rhine-Westphalia. In 2008 the section with four lanes in each direction has been extended to the interchange ''Köln-Dellbrück''. Currently widening work is going on between ''Köln-Dellbrück'' and ''Köln-Mülheim''. It was scheduled to be complete in autumn 2012.
The A1 has mostly a speed limit of 100 km/h. It has recently been raised to 120 km/h northbound between ''Köln-Lövenich'' and ''Köln-Bocklemünd'' as well as between ''Kreuz Köln-Nord'' and ''Köln-Niehl''. On the A4 the speed limit is 120 km/h. On the A3 there is a variable speed limit up to a maximum of 120 km/h.

In preparation for the 2006 FIFA World Cup the A 3 was outfitted with a traffic management system which is able to route traffic around congestion and construction sites.

"Second Beltway"

In the 1970s, a second beltway around Cologne was considered, incorporating existing Autobahns, instead of expanding the first one to more lanes. An expansion of the old beltway was considered as too expensive because of the large number of bridges. It was planned to incorporate some of Cologne's other Autobahns into this second Autobahnring. These plans were however never implemented.

See also

* List of streets in Cologne
* Transport in Cologne

External links

{{commons category, Highways in Cologne

Information about the Cologne Beltway at the ''Landesbetrieb Straßenbau NRW''

Autobahnatlas Online

Transport in Cologne
Roads in North Rhine-Westphalia
Autobahns in Germany
Ring roads in Germany