Well then there ya go!
There are other roads, that are not classified as "highways", that have more than a 30mph speed limit
There's a local (let's call it "road", I don't know if it's a freeway or a highway or a speedway or street, or whatever) that has a speed limit of 45mph, and in places has a concrete Jersey barrier divider, and in other places it's just a grass median. Typical flow of traffic is about 55mph, so when AP restricts me to +5mph, it becomes not very useful. At least let me do +10mph in places where there's a concrete divider! (it was no restriction prior to the update)