[SAI_Peregrinus]

I've never seen an interstate off-ramp in the US with a 25MPH speed limit (white sign). I've seen 25MPH advisories (yellow sign), but those aren't a legal limit. Advisory signs are the maximum safe speed for the worst possible conditions (road covered in ice).

I otherwise agree.

[FireBeyond]

Interstate, no, and actual speed limit, no, but the one I always think of is this, on US 101, near Steamboat Island in Olympia where you come off a 60mph two lane state highway to an off-ramp that is 430' long and has an advisory 10mph speed for a very unforgiving 90/180 degree turn (160' diameter circle) - with the ability to rear-end people joining the highway if you miss the first part of the turn or the ability to t-bone people if you miss the second. ChatGPT describes the braking required as being at the high end of moderate, almost hard braking, for a sustained 9 seconds to slow sufficiently to make the turn, assuming you start braking the moment you are in the exit lane (and there's no advanced warning, just a single "10mph" yellow sign as you enter that lane): https://imgur.com/a/uns86kp