What does the sign shown in the picture mean?

What does the sign shown in the picture mean?undefined
Narrow bridge ahead, allow only one-way traffic, you have priority to pass
Narrow bridge ahead, allow only one-way traffic, you must wait for oncoming vehicles to pass before you can proceed
Both cars can pass on the road, be aware that small cars should give way to large cars
If your car is white, you have priority to pass

"Bridge ahead: the road narrows and only allows one vehicle to pass. You have the right of way on your side."