Show of Hands

It's fascinating.

Highway = interstate

So you should pick blue then.

No no, there are county highways, state highways, US highways, and interstates. Check your signage.

Yes, I know. But here a highway is an interstate highway. It is implied. And I know it's implied because I authored the question.

Obviously not enough to signage.

That's what you call them because that's the local vocabulary. Like soda vs. pop...

en.wikipedia.org/wiki/Highway_shield

I know the difference, and we are not the only ones that just call it a highway. Ones a highway, the other is a US Highway, US Route, Et #____, or the name like Davis Jefferson highway, GW Parkway, etc.

Or interstate highway.