What is the meaning of the following traffic sign?

- Correct answer: Driving in the direction marked with a yellow arrow is permitted for public transportation only.
- You have right of way on the narrow road.
- Give right-of-way to opposite motor traffic on a narrow and steep road.
- Drive only forward. Turning is prohibited.
Why this is the answer
The correct answer in the official bank: Driving in the direction marked with a yellow arrow is permitted for public transportation only.
The yellow arrow on the sign marks the direction in which travel is permitted for public transportation only, and the white arrow marks the opposite direction. So you should expect public transportation vehicles to come toward you. Do not confuse it with the sign for right-of-way on a narrow road, where the arrows are white and red.