The Sunset Rail Improvement Project began last weekend, closing two intersections while crews replaced aging rails and components on the heavily used N-Judah light rail line, and also repaved, improved sidewalks and upgraded water lines.
The project continues from 7 p.m. today to 5 a.m. Monday, according to Muni spokesman Judson True. The last part of the project is scheduled to take place from Dec. 4 to Dec. 7.
Bus shuttles will serve customers on the line between Church Street and Duboce Avenue and the beach during the project and traffic will be diverted from the intersections of Judah Street and 19th Avenue, and Judah Street and Sunset Boulevard.
Last weekend's work at the intersection of Judah Street and Sunset Boulevard was delayed due to concrete used in the project that was not hardening as quickly as planned, True said.
The concrete mix used last week will be replaced for all subsequent work, and all concrete poured last week has been tested and certified as safe for light rail operation.
The work on the intersections will cost $2 million and is part of a larger $18 million rail improvement project that will cover two Muni lines in addition to the N, the J-Church and the L-Taraval.
Beginning in early 2010, intersections along the J and L lines will also receive new rails, repaired street pavement and other improvements.