reddit user adamc4 has spent some time looking through Google Street View along the borders of US States. He noticed that sometimes it’s pretty easy to tell when you’re entering a new jurisdiction without even needing the giant “Welcome” signs.
Other times it’s not as apparent, except for the abrupt end new pavement, and the mis-matched lines.
It’s a neat exercise and I’m sure there are other examples. He has a few more border differences in this imgur album. People on reddit even showed that other countries are similar, except on a country scale.