Orange, Blue and Silver line Metro riders should expect a 16-day shutdown of the rail lines between Eastern Market and Minnesota Avenue and Benning Road starting Saturday.  

Metro General Manager Paul J. Wiedefeld announced on Thursday the second of 15 planned shutdowns and single-tracking plans for the transit system as part of its SafeTrack plan . Free shuttle buses will be available between stations that are closed for track work.  

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All lines will operate trains every 20 minutes starting at 10 p.m. The plan aims to squeeze three years worth of work into one year. The first SafeTrack “surge” with single tracking between Ballston and East Falls Church in Virginia, began June 4 and finished ahead of schedule, Wiedefeld said.