If you had a freeway billboard, what would it say?

Billboard on a Freeway?
The premise won’t translate.
Advertising hoardings
Are banned on motorways.
In the U.K. they’re illegal
On busy motorways.
We just like our drivers
To focus on the road.
So I’ve a ‘Freeway Billboard’
I guess it’s U.S.A?
My message to Americans,
‘Have you picked the right road?’