Overview
Neumarkt is a Stadtbahn station in Innenstadt, Cologne. The station is divided in an overground part for low-floor trains and an underground part for high-floor trains. It is important as a junction between the low-floor east-western lines (1, 7, 9) and the high-floor lines (3, 4, 16, 18).
Overground station
The overground part consists mainly of two low-floor platforms on the Neumarkt square used by the East-western trains of lines 1, 7, and 9. Although most of the trains don't terminate here in regular service, there is a loop surrounding the place. This loop, used for example by additional trains to the Stadium and by line 7 in the late evenings uses two additional platforms at the northern end of the Neumarkt. From the main platforms, there are stairs leading to the underground part of the station and to the HUGO-Passage.
As part of improvements to the East-West axis, which in peak hours operates the maximum of 30 trains per hour per direction, the platforms will be lengthened to 90m to accommodate new longer trains. Building a new tunnel for lines 1, 7 and 9 is also considered, but it would only minimally improve service, and would be difficult to build due to the existing tunnels, which were not made for a second set of tunnels below them.
From Wikipedia (CC BY-SA 4.0).