What is the meaning of the following traffic sign?

- Tunnel entrance.
- Barrier ahead.
- Vehicle height restriction. No entry for a vehicle that exceeds, with its cargo, the height that is indicated in the sign.· Correct answer
- Narrow and low roadway.

The sign indicates a height restriction for vehicles. Entry is prohibited for a vehicle whose height together with its load exceeds the height stated on the sign. Therefore the correct answer is 'height restriction for vehicles'.
Sign with a number and a height symbol = height restriction
Confusing it with other prohibition signs
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