***UPDATE:  Due to inclement weather, previously scheduled work on the 1 Line has been cancelled.

Here’s the rundown on weekend service changes in the city subways due to NYC Transit’s work repairing, maintaining, and upgrading tracks, stations and signal systems.

1
***1 Work CANCELED. From 11:30 p.m. Friday, February 20, to 5 a.m. Monday, February 23, service is suspended between 96 St and Van Cortlandt Park-242 St. As alternatives, take AC, M3, M100 or free shuttle buses.

3
From 11:45 p.m. Friday, February 20, to 5 a.m. Monday, February 23, trains replace 4 service in Brooklyn. 3 trains run express in Manhattan.

4
From 11:45 p.m. Friday, February 20, to 5 a.m. Monday, February 23, service is suspended between Brooklyn Bridge and New Lots Av. As alternatives, take 23NQR.

5
From 6 a.m. to 11 p.m. Saturday, February 21, and from 8 a.m. to 11 p.m. Sunday, February 22, service is suspended between Grand Central-42 St and Bowling Green. As alternatives, take 46R.

6
At all times until spring 2015, trains skip Zerega Av and Buhre Av in both directions.
• For service to/from Zerega Av, use the Bx4 or shuttle buses to connect between Zerega Av and Castle Hill Av; free transfer is available with MetroCard.
• For service to/from Buhre Av, use the Bx8, Bx24, or shuttle buses to connect between Buhre Av and Middletown Rd; free transfer is available with MetroCard.

6
From 6:45 a.m. Saturday, February 21, to 7 p.m. Sunday, February 22, Brooklyn Bridge-bound trains run express from Parkchester to Hunts Point Av.

A
At all times until summer 2015, Far Rockaway/Lefferts Blvd-bound trains skip Rockaway Blvd.

A
From 11:45 p.m. Friday, February 20, to 5 a.m. Monday, February 23, service is suspended between Lefferts Blvd and Rockaway Blvd. Free shuttle buses provide service via 80 St.

A
From 11:45 p.m. to 6:30 a.m., Friday, February 20 to Sunday, February 22, and from 11:45 p.m. Sunday, February 22, to 5 a.m. Monday, February 23, 207 St-bound trains run express from Canal St to 59 St-Columbus Circle.

C
From 6:30 a.m. to 11 p.m., Saturday, February 21 and Sunday, February 22, 168 St-bound trains are rerouted via the F from Jay St-MetroTech to 34 St-Herald Sq and then via the D to 59 St-Columbus Circle.

D
From 5:30 a.m. to 8 p.m., Saturday, February 21 and Sunday, February 22, service is suspended between Coney Island-Stillwell Av and Bay Pkwy. As alternatives, takeFQ, B1, B64 or B82.

E
From 11:45 p.m. Friday, February 20, to 5 a.m. Monday, February 23, Jamaica Center-bound trains run express from Canal St to 34 St-Penn Station.

E
From 11:45 p.m. to 6:30 a.m., Friday, February 20 to Sunday, February 22, and from 11:45 p.m. Sunday, February 22, to 5 a.m. Monday, February 23, World Trade Center-bound trains run express from 71 Av to Queens Plaza.

E
From 12:01 a.m. Saturday, February 21, to 5 a.m. Monday, February 23, Jamaica Center-bound trains run local from Roosevelt Av to 71 Av.

F
From 11:45 p.m. Friday, February 20, to 8 p.m. Sunday, February 22, Coney Island-bound trains run express from Smith-9 Sts to Avenue X.

F
From 12:01 a.m. Saturday, February 21, to 5 a.m. Monday, February 23, Jamaica-bound trains run local from Roosevelt Av to 71 Av.

L
From 11:45 p.m. Friday, February 20, to 5 a.m. Monday, February 23, service is suspended between 8 Av and 14 St-Union Sq. As an alternative, take the M14 bus.

N
From 5:30 a.m. to 8 p.m., Saturday, February 21 and Sunday, February 22, service is suspended between Coney Island-Stillwell Av and 86 St. As alternatives, take FQ, B1 or B4 buses.

Q
From 11:15 p.m. Friday, February 20, to 5 a.m. Monday, February 23, Coney Island-bound trains run express from Prospect Park to Kings Hwy.

R
From 5:30 a.m. to 11 p.m. Saturday, February 21, and Sunday, February 22, Bay Ridge-bound trains run express from 71 Av to Queens Plaza.

For up-to-date information on MTA service status, go to www.mta.info. Sign up for email or text alerts at www.mymtaalerts.com. For weekend subway service changes, visit www.mta.info/weekender.