Loading and unloading is care rather than driving. Assisting a resident with a walker onto a lift, securing a wheelchair, or steadying someone on the steps is an activity that produces falls, and a fall during that process may be a professional liability claim rather than an auto claim, or both. Which policy responds turns on facts nobody establishes in advance.
Passenger severity is structural. Frail occupants with osteoporosis, on anticoagulants, with limited ability to brace, produce serious injuries from moderate impacts.
Wheelchair securement is a specific and recurring failure mode with its own standards and its own litigation.
Driver qualification is uneven. Community buses are frequently driven by activities staff or maintenance staff rather than by professional drivers, and motor vehicle record checking is inconsistent.
Home care is the outlier. An agency with no vehicles at all can have hundreds of employees driving personal cars to client homes every day, entirely on non-owned coverage, with the agency exposed to every one of those trips.
Volunteer drivers, common in nonprofit and faith-based settings, sit in an awkward category that many policies do not clearly address.