On Saturdays, during the holiday shopping season, the Town is allowing free parking at all metered spots in the two municipal parking lots in Arlington Center (Russell Commons lot on Mystic St. and the Rail Road lot on Lamson Way / Water Street). This free offer is ONLY available in municipal lots and on the following Saturdays Nov. 29, Dec. 6, Dec. 13, and Dec. 20. All street meters are in effect as usual.