https://mexiconewsdaily.com/culture/queretaro-train-route-will-take-a-detour/

 especially the 100km not formally acquired whatever that means sounds very bad for timely completion.

An 8-kilometer detour will be designed to protect petroglyphs along the proposed Mexico-Querétaro rail line.

CDMX-QRO train route will take a detour to save ancient rock art

There have been multiple proposals for high speed rail linking the cities, most recent one aims for completion in 2028 https://es.wikipedia.org/wiki/Tren_M%C3%A9xico-Quer%C3%A9taro

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