I guess GP meant to build a train from downtown NYC to JFK.

Another one? JFK is connected to the subway.

It is a slow subway train that requires transfers at Jamaica to the airtrain and then an internal airport people mover. Some people need multiple transfers from

WTC/Penn/14th street are centrally connected stations that should have a direct connection to JFK.

Run an express A-C-E train from central-park, 34th, 14th, WTC, Atlantic, Jamaica, JFK. It should not be that hard. While we are at it, run an express downtown manhattan to Newark train/BRT too. LaGuardia is....hopeless.

The upstream comment ambiguously suggested a train as a solution to an 8-10 hour door to door LA to NYC travel time. Either that means connecting the airport to the city by rail or the cities themselves. Sub-8-hour LA to NYC by train is beyond any currently known technology. JFK is already connected to NYC’s subway by rail.

> Sub-8-hour LA to NYC by train is beyond any currently known technology.

But oh so close!

https://news.ycombinator.com/item?id=26589001

;)

No, it's connected to AirTrain, which is slow and unpredictable, which is then connected to either the A or the LIRR.

Sorry I meant that you can use rail to get to and from JFK to the parts of New York served by the subway.

If the claim was to build a sub-8-hour LA to NYC train that’s obviously not going to work because of physics. If the claim was we need rail to LAX and JFK that’s silly because both are already served by rail.

It might be palatable if it's quite a bit less expensive, which could be the case if we start passing externalized costs (e.g. offsetting the impacts of carbon emissions, pollution, noise, etc.) down to the consumers who use these services.