Kö-Bogen Düsseldorf Verkehrsinfrastruktur Straßenbahn Tunnel
© Dirk Krüll

Kö-Bogen Traffic Infrastructure


Kö-Bogen Verkehrsinfrastruktur
©Ralph Richter

Reorganisation of the Inner-City Traffic Facilities

Kö-Bogen, Düsseldorf's major urban development project which was made possible by the construction of the Wehrhahn line, not only includes the urban connection of Königsallee to Hofgarten but also the reorganisation of above-ground and underground traffic areas. Tram systems, traffic routes, tunnels and squares in the centre of the state capital were rebuilt and redesigned by 2016. The reorganisation of the traffic areas and the tram route involved redesigning the inner-city areas covering Hofgartenstrasse/ Elberfelder Strasse/ Königsallee, Hofgarten/ Jan-Wellem-Platz/ Schadowstrasse and various other side streets. The new light rail route runs partly through the Hofgarten.

The lowering of the streets and the removal of dividing streets will significantly improve both the amenity value in the city centre and potential uses for public transport, pedestrians and cyclists. Private traffic and public transport are systematically separated, which significantly increases the functionality of both traffic modes. In addition, the main shopping areas are linked and pedestrian connections optimised. The Kö-Bogen Tunnel was implemented within the specified time schedule and cost limits.

Public Transport Services Maintained during the Construction Phase

The project was divided into two construction phases. In the first phase, the Hofgartenstrasse/Elberfelder Strasse were lowered by executing the north-west and south-north tunnel sections in order to create a pedestrian connection between Königsallee and the Hofgarten. In the process, the tram line was relocated between Jan-Wellem-Platz and Heinrich-Heine-Allee. In the second construction phase involving the construction of the north-south tunnel, another road tunnel was implemented along the axis of the former Jan-Wellem overpass. In addition, design work included the connection of the Kö-Bogen high-rise buildings to the tunnel structure, the underground connection to the existing underground garages of the Schauspielhaus and the Dreischeibenhaus as well as the existing sewers and pipes, and the integration of the crossing underground rail tunnels of the Wehrhahn line.

As public transport services and private traffic had to continue running during the entire construction period, the construction site was also referred to as "open-heart surgery". Due to the lower level of the Wehrhahn line which crosses the tunnel system, the construction of the road tunnel had to be coordinated with the parallel construction of the light rail line and each of the traffic phases had to be detailed at a higher level. In addition to the construction phase challenges and the confined conditions for construction site logistics, the project also features a variety of engineering construction methods from the fields of special ground engineering, underground construction and tunnel construction.

Project Data


Landeshauptstadt Düsseldorf



Technical Specifications

Project surface area: 54,000 m²
Tunnel construction method:
cut and cover, partly
Milan method
Total tunnel length: 2,022 m

Services Schüßler-Plan

Building Construction and Structural Design

  • Building construction and structural design (civil engineering and traffic facilities)
  • Feasibility studies
  • (Structural) fire protection
  • Life cycle costing/ economic efficiency calculations

Transportation Infrastructure

  • Transportation planning
  • Traffic analysis
  • Traffic consulting
  • Traffic engineering studies
  • Development planning
  • Microsimulation
  • Commissioning concepts
  • Commissioning management

Project Management

  • Project lead
  • Project control
  • Project controlling
  • Cost and schedule management
  • Quality management
  • Contracting management oder tendering management

Construction Management

  • Site management
  • Construction and site supervision
  • Contract, claim and quality management
  • Abutting property owner management and PR management
  • Commissioning management

Construction Logistics

  • Construction work scheduling
  • Scheduling
  • Production concepts
  • Construction site facilities and site use management
  • Supply and disposal

Lead Consulting

Geotechnical Engineering

  • Special civil engineering
  • Demolition and dismantling planning
  • Soil mechanics, earthwork and soil engeneering

Structural testing and maintenance

  • Inventory analysis

Kö-Bogen Düsseldorf Verkehrsinfrastruktur

© euroluftbild.de/Hans Blossey

© Photographie Ingo Lammert

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