I was traveling with my best friend alex (former pilot and many years in the aviation field with a security clearance but is now disabled) and his fiancã© darlene at about 9:40 am going south bound on i-75 at about mile marker 20 when i noticed a large black square object in front of us several miles out and a high altitude hovering. we where on i-75 south for about 20 minutes it stayed stationary and was in view until we got in the parking garage at university of cincinnati medical. at about 10:15 am when we got in to alexâ€™s doctors office i could see it again through the window. i was then able to take a picture of the object. i turned and walked about 8â€� over to my chair and sat down and when i looked out over the window about 7 to 10 seconds later it was gone. the object would have had to take off at a very high rate of speed to disappear in that short of a time period. the object was in the area of the cincinnati airport. i did not see any other aircraft in the area while the object was in sight. my friend alex has called several people he knows in the aviation field and none of them would comment on the subject other then to say you did not see what you thought you saw. i would like to know what the object was and if anyone else has reported the same object.