Whit LED gate arm lights having accidents are common, hitting people or cars, but can be prevented with the new technology of LED articulating gate arm integrated with red indicating the bar is down. Green suggests the component is up, allowing the LED parking gate arm to be more visible to drivers, cyclists, and pedestrians in dark environments, preventing future accidents. Once installed, the lights on the barrier arm can be configured to be one color when down, change to a second flashing color when open, and change to a third color when fully open. Being made of polycarbonate, it is weather-resistant and visible from a distance. Several LED gate arm lights mounts are flat and easy to install, and some designs can fold down the arm to make it less obstructive, ideal for low headroom spaces.