Driving along highway 95 going from Beatty to Las Vegas on my way home from California I looked off to the left and noticed a redish white orb that kind of looked like a street light up ahead. When I past it or at least thought I past it the orb started moving at the same speed as me (above 60 mph) it went on like that for about 10 miles in distance and then disappeared just as fast as it appeared.to this day I still don't know what it was that was following along side of me.