A garbage truck on fire is causing chaotic scenes on one of Sydney’s busiest roads. The M5 Motorway is closed in the westbound lane due to fire on a garbage truck, which has dumped its load. Camera Icon The M5 Motorway is closed in the westbound lane due to fire on a garbage truck, which has dumped its load. Supplied Credit: Supplied Source Known“8 trucks and about 25 firefighters working to extinguish the fire and contain run-off.” Camera Icon A huge build-up of traffic on the M5 Motorway following a garbage truck fire.