I was in Reno this weekend and it was the first time I've ever seen a yield sign on a freeway on-ramp. It doesn't make any sense to me why that sign would be there. I always thought that your suppose to stop and wait for the cars your yielding to pass, so if there would be traffic then stopping would be mandatory if there was a yield sign until there's no cars around. Besides Reno, I've only seen yield signs in situations where the speed limit is low, or where there would be a stop sign but instead is a yield sign. Since your suppose to speed up to get onto the freeway doesn't that make things more difficult and dangerous. Reno does have the most massive freeway construction project that I've seen going on at the moment so that could be why they have the yield signs, but as a permanent feature, I can't see it.

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1992 Mercedes-Benz 400E
2002 Mercedes-Benz ML500