Traffic in Downtown Savannah will be affected when several roads close during the 2013 Shamrock Run.

The annual Run, benefiting the March of Dimes, is set for 6 p.m. Friday. Prior to the run, at 5 p.m., roads at the starting line located near Ellis Square, between Montgomery Street and Whitaker Street will be closed. Savannah-Chatham Metropolitan Police will close roads along the route as necessary.

The race starts at the intersection of Congress and Jefferson Street, then south on Jefferson Street to York Street, east on York to Bull Street; south on Bull to Gaston Street; west on Gaston to Whitaker Street; south on Whitaker to Park Avenue; east on Park to Drayton Street; north on Drayton to Gaston, west on Gaston back to Bull; north on Bull to Congress Street; east on Congress to Drayton; north on Drayton to Bryan Street; west on Bryan to Bull; south on Bull to Congress; then west on Congress to the finish line on Barnard Street.

Roads will reopen to vehicle traffic as runners pass the specified intersections. Traffic delays are probable. Motorists are urged to seek alternate routes.