Yet another small random gripe from having been in Europe and back in the States…
Why do Europeans use the yield sign everywhere? Well, yes, there are some stop signs (more than in New Zealand), but when getting on a motorway/freeway/autobahn, most of the time the yield sign really means that you are to merge–you get an acceleration lane for a short time. The US merge sign makes a lot more sense, especially as sometimes you get on these kind of roads and there is *no* acceleration lane–you had better stop unless there is a gap in traffic right there.
On the flip side, why are we in the US so enamored of the stop sign? Virtually every intersection in the US has a stop sign or two or four, yet in many cases what is more appropriate is, ahem, the yield. This is why the rolling (or “California”) stop is so common–the driver can see there is no oncoming traffic and losing all momentum only to crank the car up again is a waste.
Seems everybody could improve some by looking at what everybody else is doing (a truism across many fields, actually).