Only mentioning this because the thumbnail is pointing out this exact situation. In my opinion a yield sign that does not give the driver a separate lane to help merge into main artery of traffic, shouldn't exist. That should probably be a stop sign.

I find it extremely dangerous that you never know what situation you're going to encounter when trying to merge with a yield sign. Sometimes you are given a separate lane and a little bit of road to help merge, and other merge points I've driven through locally, don't give you a separate lane at all, if you don't completely stop and a car happens to be coming, you will hit them. And sometimes the angle of the ramp makes it hard to see if a car is coming until its almost too late. This situation is dangerous both if you don't take precautions and completely stop, and also if you do completely stop, but the car behind you wasn't expecting it, because its a yield sign, and most people are used to being given space on the ramp to merge, vs coming to a complete stop.

Its crazy to me a yield sign has unpredictable results as far as what kind of situation you're entering into: am I given merge lane or not?