Every time I see this sign, I wonder what it’s doing here, on the corner of Arlington and Newbury, at the edge of the Public Garden in Boston. It’s straight out of an English motorway, with that distinctive typeface, the bird’s-eye representation of the street layout, and the mysterious “C-28, C-9” indicators. It’s a dead ringer. This sign is the only one I’ve seen like it in Boston, much less anywhere else in the US, and I can’t figure out why it’s designed that way, or why it’s there. Maybe it’s a question for Mac at Starts & Stops.