What does a sign with the number 50 inside a blue circle mean?

Answer and explanation

Correct answer: A. The minimum speed is 50 km/h

  1. Step 1: Blue circular signs are mandatory, so a speed number on one is a minimum speed that drivers must keep unless conditions make it unsafe.
Answer
The minimum speed is 50 km/h.
Why not the others: The maximum speed is 50 km/h, A 50 km/h speed zone ends and Parking is allowed for 50 minutes don't fit.

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