Practice question

What is the legal effect of an 'IG-L' (Immissionsschutzgesetz-Luft) speed limit display (e.g. 'IG-L 100') on an Austrian motorway for a bus driver?

  1. Buses are completely exempt from IG-L limits and may travel at 130 km/h
  2. Buses must drive 10 km/h faster than cars to prevent exhaust buildup
  3. Buses must strictly comply with the posted IG-L speed limit just like other motor vehicles
  4. Buses must immediately exit the motorway at the next interchange

Answer: C — Buses must strictly comply with the posted IG-L speed limit just like other motor vehicles

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