hi wiers, you have to choise but actual first ranked (#7) is a "route's shield" (like the famouse route 66).
I am italn so i did a research on google and i used the "interstate's shield" that i have seen (
http://images.google.com/images?hl=en&um=1&sa=1&q=interstate+shield&btnG=Search+Images&aq=f&oq=)
if you want i can change my design with the route's shield
tnx
p.s.: if i am wrong, please, excuse me.