I feel like electric powered self driving golf carts like these with a speed limit of 20 miles an hour would be a popular intermediary step toward self driving automobiles.  The lowered speed would give the cart's AI more reaction time when determining a road hazard.  They'd be very usefull in cities and even in suburbs.  When I rode public school buses I was always disappointed by how circuitous and counterintuitive the route to take me home would be.  I'd basically see every neighborhood within six a mile radius before it reached mine.  If walked to and from school the trip would take me the same amount of time.  If I carpooled with a few kids on a self driving cab the size of the golf cart in this video, I could have  probably gotten home more quickly.