Transport in Cologne have legal rights to dig in all future building sites within the medieval city limits before all heavy construction machinery. Currently the average cruising speed is 26.6 kilometers per hour (2006). The Rhine-Ruhr S-Bahn has 5 lines which cross Cologne.The S13/S19 runs 24/7 between Cologne Hbf and Cologne/Bonn Flaughafen. Cologne Ports (HGK) is one of the largest operators for inland ports in Germany. Ports include Deutz, Godorf, Mülheim and Niehl I and II. The name of Cologne's international Airport is Konrad-Adenauer-Flughafen. It is shared with the neighbouring city of Bonn (Cologne/Bonn Region). It's the sixth largest airport in Germany while
Transport in Cologne German limited access highway ("autobahn") was opened in 1932 between Cologne and Bonn. Today, this is A 555. In 1965 Cologne became the first German city to be fully encircled by a beltway. Shortly after the Second World War reconstruction plans by, among others, Rudolf Schwarz called for a downtown bypass freeway (the ) as a centerpiece of rebuilding the city. These schemes were only partially executed though, due to opposition by environmental groups. The completed section became "Bundesstraße (Federal Road) B 55a" which begins at the "Zoobrücke (Zoo Bridge)" and meets with A 4 and A 3 autobahns at