On the Silver Line, quality is job 2

Marc takes the Silver Line out of Logan at some godawful hour like 6 a.m.:

The signs explaining bus service at Logan International Airport show the usual care and exactitude of the Massachusetts Bay Transit Authority.

Outside terminal C, where JetBlue flies, "Commuter rail" is twice misspelled "commnuter"; MBTA police have the unique and impossible "6117" area code; riders are told "exact change [is] required" but not what the ride costs; and there's no posted schedule. ...