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What is the maximum speed for a heavy lorry without a trailer on a road with this combination of signs?

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A heavy lorry is permitted to drive at a maximum speed of 90 km/h on motorways and clearways and a maximum 80 km/h on all other roads.

Since the sign does indicate that this is a motorway, the applicable speed is 90 km/h.

Reasons for limiting the speed of heavy lorries:

  • Lower emissions (lower speed = lower fuel consumption).
  • Increased traffic safety (shorter braking distance and fewer lorries overtaking).
  • The small time gain does not make up for the increased costs of fuel and wear.

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