On September 4, 2011, a one and a half kilometer long new line from the Adlershof S-Bahn station was opened. It runs from the Adlershof science and business hub to the provisional terminus Karl-Ziegler-Straße at the campus Adlershof of the Humboldt University. The route, with three newly built stops, cost 13 million euros and was first serviced by lines 60 and 61 at overlapping 10-minute intervals. Since 13 December 2015, line 63 has run to Karl Ziegler Street, replacing line 60. The connection was originally planned for coompletion in 1999. However, the plan approval procedure was only completed in 2002. Shortly before the plan approval decision expired after five years, the project was approved on August 9, 2007, and soon after the first masts for the overhead line were set up. It is expected to carry 9,000 passengers per workday.