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The first rails in New Mexico were laid by the Santa Fe. It crossed the Raton Mountains from Colorado on November 30, 1878. Pushing toward Santa Fe, the tracks reached Las Vegas on July 4, 1879. A branch line reached Santa Fe on February 9, 1880. The track was extended to Albuquerque on April 15, 1880 and connected with the Southern Pacific on March 8, 1881 at Deming.
The first installation of automatic block signals I can find was Shoemaker to Waterous, NM 9 miles and 4 miles around El Paso in 1916. The next was 3 miles between Albuquerque to Hahn in 1917. It installed automatic block signals Glorietta to Fox in 1919. It began installing automatic block signals between Las Vegas, NM and Sands 33 miles in 1921 and was advancing toward Gise in 1922. By 1925, the whole line was equipped with automatic block signals. Automatic train stop was added in 1947. CTC was added in segments between Trinidad and Raton in 1952. Work began in Trinidad and proceeded west. The first segment to Jansen was completed in April, then to Wootton in June, and finally to Hebron (first siding west of Raton) in August. The CTC machine was in the dispatchers office in Las Vegas. Pictures from my collection of slides in this series are on disks 62 and 63. I've also added several new pages with pictures from Jack Delano taken in 1943 at Albuquerque and Isleta. As a reference, I've added a timetable for both the Raton and Glorieta Subdivisions.