My daughter and i were driving home from phx, we were in the flat area, i think near cordes junction, in front of us we noticed 6-8 blue and green pulsing lights, very bright, up ahead and slightly to the right. above the horizon but as we got closer we were still unable to judge the size, height, or distance. neither of us had ever noticed lights on this section of the road and we both travel this road often and many times at around this hour of the morning. we watched for at least a full minute then suddenly the lights dissappeared. as we drew near to the area where we expected the lights to have been located we saw that there were no structures of any kind at all. we both got the visual impression that they were lights mounted to a bridge, yet perhaps mounted on the far side not facing us. they rather reminded me of the flashing lights you see on top of tall suspension bridges or guy wires, for aviatioin hazard warnings. but the lights dissappeared w/o a trace, leaving us both very puzzled.We never could determine any dimensions of any kind due to the fact we had no clear reference point with which to compare to. the surface was flat. if anyone knows of lights out there in that section of the desert that serve an intentional purpose that we just happened to miss before, please enlighten us!