Because this is lol <<sobs>>

Also, I’m not sure that six minute headways are possible on some lines due to interlining (stares at the R and DeKalb), but there has to be a way to get trains more than every ~15 minutes on the C/F/R. These are local utility services. Keeping them useable is a baseline service requirement, even by the MTA’s own operating philosophy. And 15 minutes ain’t it.

@ndhapple in ETA's (admittedly cursory) analysis, we found it was feasible on basically everything except DeKalb and the 60th St Tunnel. The main sacrifices were swapping the D/Q (so switches don't have to move) and reduced W train service plus always giving the N/R priority through the tunnel. Everything else should be easier to schedule with 6-min service (e.g. no longer dealing with uneven headways at Columbus Circle or 149th)

@wmeehan @ndhapple Yeah, DeKalb is a problem because of an interaction between interlining and how every service through the junction runs on a separate non-Takt timetable; making everything run on the same headway makes things easier to run. Peak traffic on the Bridge was 38 tph in 2015 and may have been higher before 2010, I forget, so moving to 40 with each service running on the same consistent headway all day should not be a problem.

@Alon @wmeehan I wonder if anyone at the MTA ever napkinned separating the R out from DeKalb with a direct line underneath. It’d be pricy but.

@ndhapple @wmeehan Wdym? The R is already on its own pair of tracks there. The difficulty is the B/D/N/Q reshuffle.

@Alon @wmeehan Right, I mean how the R has to cross over between DeKalb and Lawrence (MetroTech) https://www.nycsubway.org/perl/caption.pl?/img/trackmap/pm_southeast_1.png