Answer and explanation

Correct answer: C. Vehicles heavier than 5.5 tonnes may not pass

  1. Step 1: A mass in a red ring is the maximum permitted mass for a vehicle in that place.
Answer
Vehicles heavier than 5.5 tonnes may not pass.
Why not the others: Vehicles must carry at least 5.5 tonnes, The bridge ahead is 5.5 metres high and The speed limit is 5.5 km/h don't fit.

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