While traveling West on interstate 80 outside Kearney, Nebraska I noticed an extremely bright bluish/green flash of light about 20 miles ahead of me at the ten o'clock position. It flashed at the rate of once every 2 seconds. At each flash the object covered several miles. It flashed 3 times while travelling east, the next flash was to my 1 o'clock position. The next flash was to my 3 o'clock position,the next was at 6 o'clock and finally at 6 o'clock but 15 miles behind me. At each flash of light the object cover 5 or more miles. I didn't see any shape and couldn't determine size because of distance. At first I thought it was light from wind generators but there none.No airport near. Family asleep. So bright it almost hurt to see. The speed was unbelievable.