What does this traffic sign mean?

What does this traffic sign mean?

1. No parking or stopping heavy vehicles in two rows
2. Have priority over oncoming vehicles
3. Overtaking between heavy goods vehicles of the same type is prohibited

Correct answer

Overtaking between heavy goods vehicles of the same type is prohibited

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.