K65b Buchrain Junction / Construction of New Rontal Slip Road

Buchrain tunnel is part of the Rontal slip road which connects the cantonal roads K17 and K65. The tunnel has a length of 862m of which 120m were constructed above ground in the western section and 17m in the eastern section. In the middle of the tunnel there is a partition niche, the 5 SOS recesses are located along the length. The safety tunnel below the carriageway leads to the exits at the east and west tunnel portals. The power control systems are integrated into the portal areas.

Main Data

  • OS 2 coating in driving area: 9,000m2
  • OS 1 hydrophobic treatment: 6,000m2
  • Exterior and interior doors: 16 pcs.
  • Emergency exit and airlock doors: 22 pcs.
  • Ventilation and cooling systems
  • Raised floor: 400m2
  • Road run-off treatment systems: 2


Lucerne Canton Construction Directorate, Office for Transport and Infrastructure, (vif)


IUB Engineering AG

Construction period


Construction costs

CHF 1.5 million

Scope of services

Planning, tendering and construction supervision for "systems and equipment"

East and west power control systems:
Paintwork, raised floor, outer and inner doors, ventilation and cooling systems, sanitary system

Emergency exit and airlock doors for the safety tunnel, driving area coating with OS 2, O1 hydrophobic treatment

External areas:
Permanent graffiti protective coating, pump system and road runoff treatment plant, metalwork