Are tricycle drivers and motorcycle-trailer (remorque) drivers required to wear safety helmets?

Are tricycle drivers and motorcycle-trailer (remorque) drivers required to wear safety helmets?

1. Helmets are required only for tricycle drivers
2. Helmets are required for both tricycle and motorcycle-trailer drivers
3. Tricycle and motorcycle-trailer drivers are only required to wear helmets inside urban areas

Correct answer

Helmets are required for both tricycle and motorcycle-trailer drivers

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.