Template:North America class I

United States: AMTK, BNSF, UP, CSXT, NS, KCS, - Canada: CN, CP, VIA - Mexico: FXE, KCSM, FSRR

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See also: List of U.S. Class I railroads, List of U.S. Class II railroads, Class III railroad, Class I rail carriers in Canada, Class II rail carriers in Canada,
Short-line railroad, List of United States railroads, List of Canadian railroads, List of Mexican railroads