Where is the use of air horns prohibited?

Where is the use of air horns prohibited?

1. In rural areas or near mountainous regions.
2. Outside built-up areas.
3. Inside built-up areas or near hospitals.

Correct answer

Inside built-up areas or near hospitals.

This is the correct answer for the Cambodian driving theory test. Questions are drawn from the official Ministry of Public Works and Transport sign library and road rules.