The Parramatta Urbos 100 are not particularly well built cars. Not just the built in trip hazards, but loose panels, to the point they fall off. Some of the cars already have a battery pack cut out. The air conditioning that goes into low power mode when the car is on battery is developing way too many faults so cars are in service with an air conditioner cut out too.
Their vehicle tracking system the 'AVLS' is buggy and crashes often. If it goes out completely they have to suspend services, as the trams can not trigger the traffic signals on their own, the AVLS sends their location to the central server which then generates a TCS message that is sent to the RMS traffic management system.
If anything in that chain stops working, the trams stop as they can't clear the traffic lights. Seems a simple induction loop 'mass detector' in the road connected to the local traffic light control box was too simple for them.
They have cheapened out one one side (cheaply built trams) and overly complicated things on the other (dependance on the AVLS and communication between different systems for operations).
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