A major road in Danbury will be closed today through possibly the end of the week.  Algonquin Gas Transmission is replacing a natural gas transmission pipeline, and due to the nature of the work, a closure has been deemed necessary for traffic safety.  Work is scheduled on Saw Mill Road from this morning through the end of the week.  The 24-hour, multi-day detour is expected to be complete by close of business on Friday. Signage will be in place for the duration of the detour.