Weekend Rails in Park Slope, Jan. 19 to 20

You can expect a bunch of service changes that will affect your trip into, around, and out of Park Slope this weekend. Make sure you get the scoop on the planned service changes before you leave the house Saturday morning:

• The F and G train will skip Smith-9th St. all times until April 2013.
• Queens-bound F trains run express from Church Ave. to Jay St.-MetroTech. Trains stop at 7th Ave. For service to Fort Hamilton Pkwy, 15th St.-Prospect Park, 4th Ave.-9 St., Carroll and Bergen streets take the F to 7th Ave. or Jay St.-MetroTech and transfer to a Coney Island-bound F.
• No G trains between Hoyt-Schermerhorn Streets and Church Ave. G trains run in two sections: 1. Between Court Sq. and Bedford-Nostrand Aves. 2. Between Bedford-Nostrand Aves. and Hoyt-Schermerhorn Streets, every 20 minutes.  
• Queens-bound A trains run via the F from West 4th St. to Jay St.-MetroTech.
• Manhattan-bound B trains run local from Sheepshead Bay to Prospect Park.
• Manhattan-bound D trains run express from 36th St., Brooklyn to Grand St., Manhattan. Trains stop at Atlantic Ave-Barclays Center. For service to 25th St., Prospect Ave., 4th Ave.-9th St. and Union St., take the D to Atlantic Ave.-Barclays Center and transfer to a Coney Island-bound D.
• Queens-bound N trains run express from 36th St., Brooklyn to Canal St. via the Manhattan Bridge. Trains stop at Atlantic Av-Barclays Center. For service to 25th St., Prospect Ave., 4th Ave.-9th St. and Union St., take the N to Atlantic Ave.-Barclays Center and transfer to a Coney Island-bound D.
• Coney Island-bound N trains run express from Atlantic Ave.-Barclays Center to 59th St., Brooklyn. Trains stop at 36th St. For Union St., 4th Ave.-9th St., Prospect Ave. and 25th St., take the D. Transfer between D and N trains at Atlantic Ave.-Barclays Center or 36th St.
• Coney Island-bound Q trains run express from Prospect Park to Sheepshead Bay. Trains stop at Church Av, Newkirk Plaza and Kings Hwy. For service to Parkside Ave., Beverley, Cortelyou Roads, Avenue H, Avenue J, Avenue M, Avenue U and Neck Road, take the Q to Church Ave., Newkirk Plaza, Kings Hwy or Sheepshead Bay and transfer to a Manhattan-bound B or Q.