I hate shitty on ramps. The one here by I25 and 34 they reworked and still is pretty shitty. (Very very tight circle followed by very very very little merging lane...)

I'm sure some of the problem with this one is that people are so used to the slow signs that they slap everywhere for really pathetic curves so they start ignoring them. I'd think any driver for that route would get a special "In 2 years, 37 trucks have wrecked this turn, take this one slow or else."