I once lived in a small city right on that state’s border. It was sort of a suburb tho to a very large city in the neighboring state. The major roads would have signage, but on the smaller roads there really wasn’t any way to tell. The main difference tho was that the large city’s public transit options extended pretty far out even into the small towns along the border, but wouldn’t at all come into my small city…

Where I live now, you have to cross a very large river to get into the neighboring state. What’s worth sharing here tho, is that there is a nearby county line, where even tho there’s a sign, you don’t need it at all. The landscape/biome changes pretty much at the county line.
It goes from a sort of temperate rainforest-like climate, to arid grassland/high desert climate. You’ll be driving thru areas with large, old growth evergreens and lots of ferns underneath, and then it turns to dead, dry, brown grass and sagebrush shrubs everywhere. Like, it could also even be raining the whole first part of the drive there, but once you get to this county line the rain almost always dissipates. It’s pretty wild.