M train

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.

The 4, 6, 7, A, C, D, F, J, L, M, N, Q, R, S and Staten Island Railway lines will all be affected.

The MTA's FASTRACK program will affect overnight service on the E, M and R lines in Queens until Friday.

The 1, 2, 3, 4, 5, 6, 7, A, C, D, F, G, J, M, N, Q and R lines will be impacted.

The same suspect grabbed the victims in five separate incidents, cops said.