S21 – restructuring the Stuttgart rail node

A total of 60 km of new railway line and three new stations – Stuttgart Main Station, Flughafen/Messe for the airport and trade fair grounds, and Mittnachtstraße rapid transit station in the new Rosenstein district – will increase the capacity of the Stuttgart rail node.


The city's main station will be converted from a terminus where trains end into a through station, but the historic station, with its striking passenger building, tower and colonnades will be integrated with the new structure.
The new Flughafen/Messe station will link the region to the south of the city to long-distance and regional transport routes.


The project will open up unique urban development opportunities in Stuttgart: tracks that now slice the urban fabric in two will give way to a new neighbourhood right in the centre of Stuttgart. This will create more green space, new housing and jobs.

  • Total line length: 57 km
  • Of which high-speed line: 20 km
  • Of which tunnels and cuttings: 33 km
  • Number of tunnels and cuttings: 16
  • Number of bridges: 18
  • Number of stations: 3
  • Stabling sidings: 1
  • Planned inauguration: 2021
  • Maximum speed: 250 km/h

  • New main station
  • New station at airport and trade fair grounds
  • Mittnachtstraße S-Bahn station
  • Untertürkheim stabling sidings

  • Europa district
  • Rosenstein district

  • City centre valley crossing with main station (section 1.1)

Valley crossing through Stuttgart city centre, the entire construction work required in connection with the new through station and re-routing the urban light rail (Stadtbahn) tracks.

  • Filder Tunnel (section 1.2)

9.5 km tunnel from main station to Filder region.

Filder region with airport connection (section 1.3)
Above-ground section of new-build line from the Filder Tunnel portal to Stuttgart's municipal boundary, the new station at the airport and trade fair grounds, and alterations to the Filder and Stuttgart-Singen lines.

Filder region as far as Wendlingen (section 1.4)
Approx. 10 km new-build line from Stuttgart's municipal boundary to Wendlingen.

  • Feuerbach and Bad Cannstatt link (section 1.5)

Long-distance and regional connections from Feuerbach and Bad Cannstatt to the main station and refurbishment of the S-Bahn rapid transit lines between Nordbahnhof and Bad Cannstatt to the main station.

  • Obertürkheim and Untertürkheim link (section 1.6a)

Eastern section of the ring, from the main station to Wangen and on to Obertürkheim, Untertürkheim and Bad Cannstatt.

  • Untertürkheim stabling sidings (section 1.6b)

Construction will be on the site of the present freight station.