[bldavies]

Somewhat related/shameless self-plug: I created an R package [1] that provides data on travel times between NYC subway stops. These data can be used to, e.g., visualise and analyse the subway network [2].

[1]: https://github.com/bldavies/nyctrains

[2]: http://bldavies.com/blog/how-central-grand-central-terminal/