Table 8: Mode of transportation used. T = True indicating that distance was calculated using current passenger train travel between cities; F = False indicating driving distance was used.

HUBCHICINNYCATLSTLCLEPITMEMNASHCHARDCPHLLOUINDYDET

HUBTTTFFFFFFFTTFTF
CHITTFFTTTTFFTFFTT
CINTTFFFFFFFFTFFTF
NYCTFFTFFTFFTTTFFF
ATLFFFTFFFFFTTTFFF
STLFTFFFTFFFFFFFFT
CLEFTFFFTTTFFTTFFF
PITFTFTFFTFFFTTFFF
MEMFTFFFFTFFFFFFFT
NASHFFFFFFFFFFFFFFF
CHARFFFTTFFFFFTTFFF
DCTTTTTFTTFFFTFFF
PHLTFFTTFTTFFTTFFF
LOUFFFFFFFFFFFFFFF
INDYTTTFFFFFFFFFFFF
DETFTFFFTFFTFFFFFF