Until where does the following road sign remain valid?

- Until the next intersection.
- Until a traffic sign that prohibits entry of vehicles with an all up weight of less than 10,000 kg.
- Until the next traffic light.
- Correct answer: Until a road sign that cancels it.
Why this is the answer
The correct answer in the official bank: Until a road sign that cancels it.
The sign remains valid until a sign that cancels it is placed. An intersection or a traffic light does not end it by itself, so drivers must keep observing the prohibition until they reach the cancelling sign.