In October 2016, the tunnel lighting system was upgraded to light-emitting diode (LED) technology; it was the first tunnel in Arizona to get LEDs.
It was the first tunnel in Arizona to get LEDs. In October 2016, the tunnel lighting system was upgraded to light-emitting diode (LED) technology.
In October 2016, the tunnel lighting system was upgraded to light-emitting diode (LED) technology. It was the first tunnel in Arizona to get LEDs.
In October 2016, the tunnel lighting system was upgraded to light-emitting diode (LED) technology. It was the first tunnel in Arizona to get LEDs.