> Someone skipping fare

This, obviously, isn't what raises fear in people. "Safer" for some statistics, like a car crash, but also much less safe for things like getting stabbed, spit on, confronted. Sure, it's somewhat rare on public transport, but they're exactly zero in my car, at freeway speeds.

edit: A quick google search shows two stabbings, one slit throat, and a page full of fights, in my area, over the last two years. While the statistics are low, in terms of per person*miles, this real difference, and the 2hr vs 30 minute times, is what keeps people and families in cars. Fundamental changes are needed.