Smart bus service can use to transport fairly large groups around and carting kids to school, rock bands to their venues/drug dealers, and compulsive gamblers to the city, all the while getting something like 6 miles per gallon. Now we could make every bus a gas-electric hybrid to improve that figure to 15 mpg or so
Most school buses offer no standing room, no luggage space, and little luxury. Specific safety features for school buses can be: distinct color, design or markings to make the bus recognizable as a school bus, and warning lights and signs to warn traffic when children are getting in and out.