Hello, everyone. The bus system in Nashville is essentially invisible. Yes, you pass by the stops and see the vehicles on the road, but for the vast majority of Nashvillians who have never and will never set foot on a bus, functionally, buses do not exist. Because you spot them scooting around town and understand them in this abstract sense, it’s hard to grapple with how expanding bus routes and increasing their service hours might affect a neighborhood. But lately, I’ve been doing some neighborhood arithmetic. Using the powers of journalism and critical thinking, it isn’t hard to see how…