The Kaisermühlentunnel is located on the A22 motorway in Vienna (Austria). With a length of 2.2 km, it is the longest urban tunnel in Vienna. With a daily throughput of more than 125,000 vehicles, it is also the busiest in Austria. With three main lanes, two secondary lanes and 10 ramps in the tunnel, it poses the highest demands.

Technical Data / Scope

  • Engineering, design, installation, commissioning
  • More than 100,000 data points
  • 2 operating clients
  • 184 managed network switches
  • 12 redundant PLC controllers, 102 OPC UA clients / Beckhoff
  • 74 traffic gateway controllers
  • 40 jet fans (90 kW electrical power)
  • 185 IP video cameras
  • 385 electrical fields
  • 240 traffic signs
  • 700 km of electrical cabling
  • 15 km of fibre optic network cable
  • 1587 LED lights in the tunnel
  • 52 emergency call stations

Renovation during night-time traffic

The operating and safety equipment is being renewed during traffic. All work in the tunnel takes place at night, with only individual lanes being closed. All components are installed and commissioned in parallel with the existing running system.

The challenge of tunnel ventilation

Due to the large number of lanes, side lanes and ramps, tunnel ventilation is extremely complex. A special tunnel simulator can be used to test the ventilation in simulation mode even while traffic is flowing, thus reducing the commissioning phase.

Highest safety category – high-availability system

All control components and communication networks are designed as high-availability systems.

Cutting-edge technology—SCADA / PLC

High safety and flexibility requirements are met by the latest SCADA system – RadeRunner. RadeRunner is a web-based SCADA technology with multi-vendor support, redundancy functionality, secure data transmission and much more …