I was with a friend on the passenger side heading toward a fair. I have been studying UFO’s for 6 years now and always watching when I’m out. So I am very knowledgeable about UFO’s, USO’s. I am also a photographer/artist where I look at detail. We were going about 60 on a spur to 295. It was a cloudy day. I see all sizes of planes daily. I know my planes. With the radio on, talking and windows up, I couldn’t hear nothing unusual. The airport is just behind it about half mile from where I saw it. It just left where the direction it was facing. Looking out in front of the windshield I looked at a charter plane facing us. I looked to my surprise a perfect white round ball was next to it. The scale of it was about the size of a car tire. I stared at because I noticed and a large luminous light that circled it completely. There was no color because it was during the day. We were driving so I didn’t see it very long. I didn’t get any kind of feelings when I saw it. It didn’t surprise me. It was a little cool that morning too.