Rectangular, almost square, a little smaller than the Goodyear blimp, no lights, gray colorSaw a rectangular (nearly square) object moving about the same speed as a blimp moves (maybe a little faster). I first noticed it while I was driving on 77N (on my left, maybe a mile or less away) by the Copley exit, lost it in the tree line, but then saw it again heading on the same straight path. Lost it again in the tree line (as the highway declines in elevation) before I exited on the Ridgewood/Miller exit.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))