Three simple lines lit up in lights on marquees stationed along entrances on US 180 and onto 4th Street are words drivers have been waiting to read: “Signals Fully Active 5-2124.”They countdown the time when the flashing red lights that have been blaring since it seems forever finally stop.At around 9 a.m., Tuesday May 21st, they’ll function as any other electronic traffic lights at major intersections: red, yellow, and green. The switch over will mean drivers have to stop and wait until the light turns green before proceeding.Texas Department of Transportation (Tx-DOT) officials did a brief trial run last week ...