4 orange orbs, fireballs over bridgeMy wife and I were just just starting to cross the 182A bridge going east between Richland and Pasco Washington at approx. 21:45 hours when I spotted 4 orange glowing orbs in a row approx. 50 to 100 feet apart. They looked to be around 100 to 200 feet above the bridge. I pointed them out to my wife and she saw them to and said they are planes. I said no, there are no red or white flashing lights and they are to close and they are staying still.I couldn't stop due to crossing bridge at 70 MPH. Once on other side we turned around on overpass and went back. As we approached I watched the lights disappear liked the turned off a switch. There is nothing above the bridge (wires, railing, power lines). I then drove to access under the bridge and looked around and saw nothing.