To cite package ‘nycroutes’ in publications use:

  Healy K (2026). _nycroutes: NYC Subway Routes and Stops_. R package
  version 0.0.4.9000, <https://github.com/kjhealy/nycroutes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {nycroutes: NYC Subway Routes and Stops},
    author = {Kieran Healy},
    year = {2026},
    note = {R package version 0.0.4.9000},
    url = {https://github.com/kjhealy/nycroutes},
  }