Theoretically you could have more on rotation at a time. Rather than have a whole bus that’s 25% full, you can have a few vans shuttling along the route. This should allow greater access since people don’t have to wait as long between buses. For example, the bus on my city are few. If I want to go to the grocery that is only a 8 miles await, the trip would take about 15 minutes by bike because there is no bus route to it. However mini vans on a known route could come get me most of the way.