THEY WERE INJURED. POLICE CARS, AS WE KNOW, HAVE RED AND BLUE LIGHTS. NOW CONSTRUCTION WORKERS HAVE. AMBER AND GREEN. A YEAR AFTER A BILL SIGNED BY GOVERNOR JOSH SHAPIRO LAST JULY IS ALLOWING FOR THAT ...

If you have ever closely observed a helicopter, you must have noticed the red and green lights. In fact, these lights are not only present on helicopters but also on commercial and private airplanes.

If you've ever been hanging out on a tall hill at night, you've probably seen some lights flashing in the dark sky above. No, it's not a mysterious UFO — the kind there are problems studying – spying ...