Cruise has this. I actually applied for the position after my contract doing the same thing with Waymo ended (but was unfortunately ghosted). They’ve got a team of people who monitor the fleets in real time, mostly just helping a “stuck” car by identifying any objects or street signs that the SDC has been confused by, so that it can proceed with its course. But they also have protocols in place for reporting any collisions as soon as they’ve happened, as well. Willing to bet that Cruise called emergency services before anybody on the scene even did.