I think they might be overpromising things by insisting on High Speed Rail (especially since there's no prospect of connecting High Speed rail in the US. "Fast Frequent Rail" (say, 90 to 110 mph max with no slow running chokepoints) might be a better value for the $$$$$$ they'll need to spend.
It is more like a 'higher-speed' rail rather than what we consider true high speed. But the fact they will put their own rails on the existing right of way seems like a good idea to me. The article didn't seem very promising for any quick results, but I believe it when they say it will be a boon for labor. They could spend the money on worse things.
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Sheinbaum said she was also planning a train line from Mexico City to the western city of Guadalajara, for about another $3 billion, and said that rail line could be extended to border cities like Nogales, across from Nogales, Arizona, or other border cities further west if there was time in her six-year term.
(Outgoing Pres_)López Obrador said the project is expected to be nearly double the size of his own railway building programs, which included the
$30 billion Maya tourist train on the Yucatan Peninsula, a railway across the Isthmus of Tehuantepec linking the Pacific and Gulf coasts, and a commuter railway linking Mexico City to the nearby city of Toluca
Mexico seems to be on a path to a much improved rail system. While it can seem frustratingly slow to get things done here in the US I can see why the way they are progressing is controversial. Not much oversight on the environmental issues.
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López Obrador, who has portrayed himself as a champion of Mexico’s long-forgotten poor, has declared the train “our legacy of development for the southeast of Mexico.”
The populist has fast-tracked construction of the train to try to keep promises to complete it before June elections, something appears all but impossible.
The government has dodged oversight, ignored court orders, employed the Mexican military in its construction and blocked the release of information in the name of “natural security.” In a violation of Mexican law, the administration also didn’t carry out a comprehensive study to assess the potential environmental impacts before starting construction.