Concarril

Constructora Nacional de Carros de Ferrocarril SA, known as Concarril, or less commonly as CNCF, was a government-owned major rail vehicle manufacturer located in Ciudad Sahagún, Mexico, from the 1950s through 1991. It manufactured a wide variety of passenger and freight cars, as well as locomotives. Formed in 1952 (some sources say 1954), it was owned by the Mexican government. After accumulating too much debt, it ceased operating in December 1991 and was sold to Bombardier, Inc. in April 1992 for around U.S.$68 million. At that time, it was the largest manufacturer of railway in Mexico. Production resumed at the Ciudad Sahagún facilities after Bombardier took over.

The Ferrocarriles Nacionales de México (FNM, or NdeM), the country's government-owned railroad company until the 1990s, purchased large numbers of railroad cars from Concarril, including a variety of freight and passenger cars. The latter included sleeping cars in addition to conventional coaches. Dining cars were not one of its regular products; it built its first such car in 1989, for FNM. The company also built locomotives for FNM and other railroads, and undertook rebuilding (or refurbishment) work on older locomotives and coaches.

Passenger railway cars built by Concarril for urban rail transit use included subway/metro cars for the Mexico City Metro and light rail vehicles (LRVs) for the Guadalajara light rail system, the Monterrey Metro and the Xochimilco Light Rail line of Mexico City's STE. The company made both steel-wheeled and rubber-tired subway cars for Mexico City. It also supplied subway cars to the Santiago Metro, in Chile; those were part of an effort by the Mexican government in 1990 to boost exports of manufactured goods, which also encompassed a planned sale of 200 Concarril-built freight cars to Venezuela.