Loops (three digit Interstates beginning with an even number) and spurs (three digits beginning with an odd number) are not considered separate from the interst

Loops (three digit Interstates beginning with an even number) and spurs (three digits beginning with an odd number) are not considered separate from the interstate off which they branch, semantically speaking. So I-4 it is. And maybe one in Hawaii? I can't recall. :) I'm from Chicago area, grew up in Southeast, many years all over eastern seaboard up to upstate NY. Limited access just means no intersection with every possible side street, basically. Was just trying to simplify it a bit for the comment. :)