Sharraxaadda

Prior to the Comm ave bridge reconstruction project this summer, southbound traffic coming off of Boston University bridge had multiple "no left turn" signs when approaching Comm Ave. I notice now frequent cars stopping in the left lane coming off the bridge to turn left directly onto Commonwealth Ave. Is left turn now allowed at Comm Ave or is the absence of signs an oversight? See attached image from 2014 where there were 3 "no left turn" signs, none there anymore.