winjim
Smash the cistern
The cars are driverless, not passengerless.That situation will never be allowed to happen, as you would then have mischievous idiots deliberately bringing the roads to a standstill by walking in front of driverless vehicles and obstructing them. They don't do that very often with driven vehicles, because it won't be long before some irate driver will get out and bash them senseless, but no driver = no repercussions.