If you read the notice, it seems to effectively make it illegal to fly drones anywhere near a road. How can a drone operator possibly verify that they're NOT within 3000ft of a vehicle owned by DOD, DOE or DHS? Are all these cars marked in such a way that a drone that's over 3000ft away would be able to recognize it, so the operator knows not to go any closer?

  PURSUANT TO 14 CFR SECTION 99.7, SPECIAL SECURITY INSTRUCTIONS (SSI), ALL UNMANNED ACFT ARE PROHIBITED FROM FLYING WITHIN A STAND-OFF DISTANCE OF 3000FT LATERALLY AND 1000FT ABOVE UNLESS INDICATED BY THE FAA BY NOTAM OR OTHER MEANS. TO: DEPARTMENT OF DEFENSE (DOD), DEPARTMENT OF ENERGY (DOE), AND DEPARTMENT OF HOMELAND SECURITY (DHS) FACILITIES AND MOBILE ASSETS, INCLUDING VESSELS AND GROUND VEHICLE CONVOYS AND THEIR ASSOCIATED ESCORTS, SUCH AS UNITED STATES COAST GUARD (USCG) OPERATED VESSELS.