There's a one-lane bridge near where I live that would pose a similar challenge. Drivers coming from the east always have right-of-way, but the only way to know this is by reading the bespoke traffic sign posted next to the bridge. To make matters worse, during times of heavy traffic westbound drivers will often stop and let through a stream of eastbound traffic. How many cars are let through is negotiated with hand signals or flashing lights and smiles.