The transit authority, since they would be the one screening and training the driver and other staff. However, if the transit authority failed to respond in an adequate manner, then it would fall back on the local government overseeing the transit authority.
Perhaps you would disagree, but it seems clear to me that a) Uber's driver screening process is inadequate, and b) the risk is magnified by it being a 1:1 ratio of passengers to drivers (vs a mass transit vehicle where bystanders can intervene), and c) Uber is massive compared to Innisfil, so there will be very little "overseeing" going on there.
All in all, this adds up to a situation where the town and its elected representatives will end up with very little control or accountability about how the service is being run.
Perhaps you would disagree, but it seems clear to me that a) Uber's driver screening process is inadequate, and b) the risk is magnified by it being a 1:1 ratio of passengers to drivers (vs a mass transit vehicle where bystanders can intervene), and c) Uber is massive compared to Innisfil, so there will be very little "overseeing" going on there.
All in all, this adds up to a situation where the town and its elected representatives will end up with very little control or accountability about how the service is being run.