I came in late on this thread so forgive me if I duplicate something that has
already been said. Shooting distances from roads varies from state to
state and sometimes county by county, I don't know what state you live in so
IMHO the best bet would be run it by your local DA or law enforcement agency.
Here in Nevada you cannot shoot closer than 1000 feet from a public road or
habitated (sp?) structure. However, a shooting club or commercial range can
be closer if approved by the State.
Good luck...hope this helps

Roger in Vegas
Worlds Greatest Impuse Buyer