The 1, 2, 3, 4, 5, 6, 7, A, C, D, E, F, G, J, M and S lines will have changes.
The 2, 3, 4, 5, 6, A, E, F, G, J, M, N, Q and R lines are all slated to undergo service changes.
No criminality is suspected, officials said.
A man was hit and killed by a Forest Hills-bound R train in the Grand Ave.-Newtown Station: officials.
The change is to meet ridership demand, which is at an all-time high, according to the MTA.
The 2, 3, 4, 5, 6, A, C, E, F, G, J, M, N, Q, R and S lines will be affected this weekend.
The delivery was made in December and included the rail involved with last week's derailment.
Four injured people were taken to hospitals while local service was restored for evening rush, MTA said.
Upgrades and maintenance is scheduled across 15 subway lines late Friday until early Monday.
Work will affect the 2, 3, 4, 5, 6, 7, A, E, F, G, J, M, Q and two shuttle lines, the MTA said.
Rail problems disrupted many New Yorkers' Thursday commute.
A man suffered a cardiac arrest after he was a hit by an M train, officials said.
A person was taken to Bellevue Hospital after being struck by a B train Thursday, officials said.
The 6, A, D, F, G, J, M, Q, N, R, Rockaway and Franklin Avenue shuttle will all be affected.
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.
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