Right turn was the wrong move at the 11foot8 bridge

Yesterday, a rental truck turned right from Peabody St onto Gregson St only to get chewed up by the canopener. The low clearance is clearly marked , but there is no height sensor and the bridge does ambush you a bit when you make that turn with a truck. To make things worse, shortly after the truck suffered the involuntary roof removal, it started to rain.