NJ Transit commuters faced delays of up to 30 minutes Wednesday morning.
Upgrades and maintenance is scheduled across 15 subway lines late Friday until early Monday.
Residents and business owners along 72nd Street may be without service until April 21st.
Hoffman died of a suspected drug overdose in the West Village.
The 4, 5, 6, 7, A, C, D, E, F, G, M, N, Q, R and S lines are all slated to undergo work this weekend.
The first music-filled service drew passersby who thought there was a concert in the warehouse.
Ambulance services for basic healthcare needs were restored to Long Island College Hospital last week.
The MTA says just about every subway line will be affected this weekend.
Flights were grounded at New York City-area airports Friday evening.
Former President Bill Clinton and Mayor Bloomberg spoke at Koch's funeral.
Anthony Laino, 30, was killed when a tree crashed through his 166th Street when Sandy swept through.
Buses began operating on a reduced schedule Tuesday, and will resume fare-free full service Wednesday.
Jonathan Delarosa, 24, was stabbed to death in Washington Heights on April 11, 2012.
Madonna Badger grieved at the Frank E. Campbell Funeral home after her family was killed in a fire.
Holy Trinity Church was among many churches struggling Sunday with the new mass translation.
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