We were driving on I43 at 1250am September 20, 2013. We had been on the road for about twenty minutes heading back to Colorado. I noticed an orange glow flying at about 3,000 to 5,000 feet heading NE about to cross the freeway. I told my son to look as I pulled off the side of the highway to a full stop. I then turned my headlights off and then on several times. At that moment it changed direction heading southeast on a dime. We stood and watched the object for a few seconds and it suddenly changed directions once again heading NE toward Milwaukee. A few seconds later the object accelerated to an incredible speed and vanished off into the distance.