Route 123 will be closed in both directions next month for about three weeks, officials say. Though town officials had asked that the work—replacing a “box culvert” or bridge near the New Canaan Field Club—be put off until next summer, the Connecticut Department of Transportation is moving forward with the work early next month, according to Public Works Director Tiger Mann. “We asked for that to be changed to the summer, and while we had already gotten a delay from them back in November, because they couldn’t detail that they were actually going to finish before winter shutdown, they won’t budge it further,” Mann told members of the Selectmen’s Advisory Committee on Buildings and Infrastructure during their regular meeting, held Monday via videoconference.