The railroad takes a gentle curve across the state line. The roads though fiercely abide by staight lines and when crowded here at the state line they jog.
Oh well, I can't figure it out. It's like they are all on straight line autopilot. They get up in the morning, guys with big toys, on both sides of the border, pick some random field with no house or river and go build a road. This whole thing is just a random extension of chaos theory.