Effective April 17, 24/7 single-track operations will begin at W.117- Madison and Triskett stations Started Apr 13 Until Jan 1 3000 Effective April 17, 24/7 single-track operations will begin at W.117- Madison and Triskett stations for rehabilitation of the eastbound bridge over W.117th Street. Boarding and alighting at W. 117-Madison and Triskett stations will take place on the north side of the platforms.