So I've noticed that during overnights, when trains are running every 18-20 minutes on each route, typically one train shows up immediately after another when interlined. Example: ![(4)]()
arrives one minute, then ![(6)]()
within ~5 minutes of that ![(4)]()
; then 13 minutes later, another ![(4)]()
, wash rinse repeat.
And the trains tend to be one close to SRO, and the one following not so much.
So why doesn't![(MTA)]()
- to ensure frequent service, passenger safety and more balanced loads, run the trains at even time intervals - like ![(4)]()
and ![(6)]()
9 minutes apart during 18 minute headways; or schedule for ![(D)]()
![(F)]()
to arrive at 34th or 42nd at the same time, etc?
arrives one minute, then 
within ~5 minutes of that ; then 13 minutes later, another , wash rinse repeat.And the trains tend to be one close to SRO, and the one following not so much.
So why doesn't
- to ensure frequent service, passenger safety and more balanced loads, run the trains at even time intervals - like and 9 minutes apart during 18 minute headways; or schedule for 
to arrive at 34th or 42nd at the same time, etc?