[2] Line B of the national railway network, which runs from Mexico City to Nuevo Laredo, was built during the Porfiriato through foreign capital investment.

On 31 August 1882, it reached Monterrey, which, together with the steel and brewing industries, triggered the development of the third most important metropolitan area in Mexico.

[4] During the 1970s, railroads built on wooden sleepers were better off than asphalt or dirt roads; and passenger transport was cheaper than the more modern civil aviation.

[7] By February 2024, Canadian Pacific Kansas City, the current operator of the Mexico City-Nuevo Laredo Line, had expressed interest in hosting the service.

[9] The Regiomontano was a luxury train which carried a dining car that offered a first class service, a menu of exquisite table wines, and dishes for dinner and lunch.