Thanks for the comments~ Here's the updated version:
- 2nd Ave Express (4 tracks phase 3)/Local (2 tracks phase 3), 125th Street, 2nd avenue <-> Culver
-> and , either one of them goes Church Avenue using Culver local, and another one goes Coney Island using Culver express
- 2nd Ave Local, 55th Street <-> Bay Pkwy (West End) OR Bay Ridge
-> Terminate at Chamber Street, weekend and late nights
Problems:
- and alone don't use all the capacities of 4 tracks design
- Platforms of station on Nassau Street Line need to be lengthened (see B-31, http://web.mta.info/capital/sas_docs/feis/appendixb.pdf )
- 's platforms in Houston Street station would be fair away from 's after making turn from E 1st street to 2nd avenue