Route 123 is closed in the area of the New Canaan Field Club for three weeks. Credit: Michael Dinan Traffic volume on Canoe Hill Road has tripled from 500 to 1,500 cars daily due to the state’s temporary closure of Route 123 due to a culvert replacement, police said last week. Officials also are finding that a “significant amount” of motorists are not using the Department of Transportation’s designated detour route on the east side of 123, and are instead using Parade Hill Road, Oenoke Ridge, Lambert Road and Country Club Road on the west side, according to New Canaan Police Deputy Chief John DiFederico.