I was driving north on rochester road. when i was a couple hundred yards south of avon road (at around 6:50 pm) i saw something entering my field of view on the left. i did a double-take because i wasn't sure if i was seeing something or not. at first i thought it was a drifting balloon but then i saw it had straight edges so maybe it was a drone? then i noticed it was sort of white, but a really dim white (almost like a faint glow or reflection), barely visible against the night sky (fyi it was a full moon) so i sought maybe it was a small airplane without its lights on. i opened my sun roof just as it passed over me. it was triangular in shape with the left and right sides longer than the back (based on its flight path nw to se) and it seemed that at the 3 points of the triangle there were white lights that were distinguishable but not much brighter than the whitish surface of the object. i immediately rolled down all my windows at took a right in hopes of intercepting it at the next mile road. i lost it, though. there were too many trees and nowhere to get a clear view of the sky. so it flew a straight and steady path nw to se over rochester and avon. it wasn't really fast but it wasn't slow either. also, when i looked at it from underneath it seemed to have a hazy whitish glow except for the 3 lights. i didn't have time to take a picture because i was driving.