#youshouldsee You should see my waaaaay too long video of me riding around town and telling you some mildly interesting stuff about it! 250,000 Millix to the first person that guesses the total number of ambulances appearing.
Yes you can rent them via smartphone. Eventually somone comes to either collect them or change the batteries. You dont have to park them somewehere specific, hence people just leaving them behind.
I suppose they're fitted with a tracking device, so they aren't lost. I don't recall these in London before moving to the US. I've observed them from afar in San Francisco and think they're used mainly by tourists. Locals are wedded to their cars.