Last month the San Francisco Municipal Transportation Agency (SFMTA) began replacing the ageing track and other infrastructure inside the 1,290 m Sunset Tunnel to improve safety and reliability of the N Judah rail service for Muni customers. The project will encompass track and infrastructure replacements inside the Sunset Tunnel, located between Cole Valley and Duboce Triangle, Transit Signal Priority (TSP) upgrades for nine intersections along the N Judah Line, and construction of two accessible platforms at Judah and 28th Avenue. Seismic upgrades involve structural retrofit of the tunnel portal retaining walls and their foundations. Visit http://www.sfmta.com. 17/15.