|
|
| Re: LIRR+Park Avenue (1554478) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: LIRR+Park Avenue |
|
|
Posted by Stephen Bauman on Thu Jul 30 16:51:35 2020, in response to Re: LIRR+Park Avenue, posted by Joe V on Thu Jul 30 16:28:36 2020. You simply stated train capacity would increase from 24 to 48 trains per hour.I stated it, so let me explain. Capacity through the tunnel is limited to 24 tph. That's due to an FRA restriction for the number of trains between ventilation shafts. The 63rd St Tunnel provides an additional 24 tph inbound capacity going in the downtown direction. If there were a loop connection from Flatbush Ave, there would be another tunnel. This tunnel would have an additional 24 tph inbound capacity going in the uptown direction. That's a total of 48 tph inbound. The outbound capacity would similarly increase with 24 tph uptown from 63rd St and 24 tph downtown through the tunnel to Flatbush Ave. There are FRA regulations that limit how quickly a passenger train can change direction (discharging/recharging brakes and a brake test). This keeps a train in the terminal longer than the disembark/embark cycle. The workaround is to have multiple tracks within the terminal for each track that leads to/from it. This leads to more expense in building the terminal. It's only money. |
|
|
|