I was driving north on HWY 81 with my family. I noticed a fast low moving object in the dark just to the west of me zoom past my car to the east. At first I thought it was a cars tail lights on an approaching over pass however there was no over pass. The object speed off at an amazing rate of speed. I could not see any shape only light. I saw it as red light, my front passenger saw it as white light. We argued over what we saw and the color of it but we both agreed we had seen something dart over our car.