Wellington Circle all tied up — again - Metro

In this week’s Starts and Stops, a reader asks about gridlock at Medford’s busy Wellington Circle, where a wiring problem has apparently caused a glitch in nearby traffic lights. In other items, the MBTA bans in-station popcorn sales by new venders, historian Bradley Clarke reflects on movies about or by the T, and WalkBoston celebrates pedestrian improvements with the US Attorney General.