I don’t understand why it’s so hard for people. There is a side road pretty much perpendicular to the highway here for a long stretch, and especially when it rains, people will put their hazards on and go 10-20 miles under the speed limit.
The highway speed limit is 60, and the side road 40. People are blowing by them on the highway. Common sense would say, “Take the side road!”
I think you mean parallel ….