Most trams I encountered cannot leave their tracks, except that specific Chinese one. Regardless of circumstances they usually are hope- and helplessly stuck. Switch is stuck? Well, every tram driver gets out to set it manually. Accident (even without cars)? Well it's not like you will drive around the site. Broken catenary? Out of luck, again. The system "tram" can hardly mitigate any faults or emergencies, therefore it is flawed IMHO.
btw: Cars are not allowed to park (vulgo: banned) on the tram tracks. There is also plenty of tracks, where cars are not even allowed to drive on (seceded, underground or elevated).
This scenario - in germany - would be 200 Euro for the citation ("Bußgeld"), just for using the phone while driving. The combined charges for negligent homicide should be much higher.