Buses on 15-501

It seems to me that a lot of us travel frequently in our cars on 15-501, especially for shopping. Why wouldn't it make sense to offer some bus options that would connect major population centers like Southern Village to all of the main shopping places along 15-501? Perhaps the bus would operate only on 15-501, back and forth between Southern Village at one end and the Home Depot/Walmart set of shops on the other?