4 train

Work will affect the 2, 3, 4, 5, 6, 7, A, E, F, G, J, M, Q and two shuttle lines, the MTA said.

The 1, 4, 5, 6, 7, A, C, D, E, F, G, J, N, Q, R, 42nd St. Shuttle and Rockaway Shuttle will be impacted.

Here's how to get around this weekend amid subway service disruptions

The 1, 2, 3, 4, 5, 6, 7, A, C, D, E, F, G, N, Q, R and S lines will all see disruptions.

Problems at Union Square sparked widespread service disruptions on the 4, 5 and 6 trains Monday.

The 1, 4, 5, 6, 7, A, C, E, F, G, N, Q, R and Franklin Avenue Shuttle will see changes.

An unattended package on the a platform in Grand Central disrupted rush-hour commutes, the MTA said.

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 1, 4, 5, 6, A, D, E, F, G, L, N, Q and R lines will all be impacted.

The 1, 4, 5, 6, A, E, D, F, G, L, N, Q and R lines will all have service changes.

The 1, 2, 3, 4, 5, 6, D, E, F, G, L, N, Q and R lines will be disrupted this weekend.

The MTA has announced a new FASTRACK schedule while tracks undergo maintenance.

The MTA would upgrade subways in and around Grand Central Terminal under the proposed 73-block rezoning.

The 6 train was suspended from Hunts Point Avenue to 125th Street after a water main broke, the MTA said.