What city of the united states has the important railroad hub?

Chicago has the most important railroad hub.

Chicago is number uno! 1/3 of the country's total cargo goes through Chicagoland! And they are also home to all 6 of the Class A rail lines in the USA and a bunch of other non-Class A ones too!

- Los Angeles
- Bay Area
- DFW Metroplex
- Atlanta

Those make up the remaining four, I believe.

Answercompass direction;