VIDEO: A garbage truck caught fire on westbound Interstate 10 through downtown Phoenix Monday. It happened shortly after 11:30 a.m. just outside the tunnel, forcing traffic to a stop. The Penguin Air and Plumbing News Chopper was overhead as firefighters knocked down the fire. The Arizona Department of Transportation shut down the westbound lanes for about 30 minutes. The agency then opened the HOV lane, allowing backed up traffic to move through the scene. The left lane opened about 30 minutes later. The right lanes and on-ramp were still blocked at 12:45 p.m., and ADOT was warning drivers to expect delays. It’s not clear what sparked the fire, but the aerial video shows massive damage to the cab of the truck and the lift mechanism.