Some notes on New Mexico's historic US 66, after reviewing the insets on the state highway map I picked up last month. These are FWIW, and I'm not sure any edits to the HB are in order.
-- The Santa Fe inset indicates that southeast of the city, historic US 66 follows at least part of the Old Las Vegas Trail (frontage road along the SB side of I-25, recently added to the HB as NM 300), rather than I-25 as the HB has it.
-- The Albuquerque inset indicates that historic US 66 follows NM 313 south of Bernalillo (where the HB has the historic route ending) into Albuquerque, then following a decommissioned part of NM 47 (still shown in OSM) into downtown Albuquerque. Then that or another historic US 66 route (this in addition to the east-west route along Central Ave.) continues on the other side of downtown, along Isleta Blvd. south to at least I-25 exit 213. The inset doesn't provide enough detail in downtown Albuquerque to indicate how the historic route segments north and south of downtown connect with each other or to the Central Ave. route, if at all.
If it helps, I can scan, and e-mail or post, the Santa Fe and Albuquerque insets.
I don't know if these mean anything:
-- NM's state highway map is undated, so all I know from the current governor's smiling face on the map is that the map was printed after she took office in 2011. But the map doesn't reflect truncation of NM 47 in Albuquerque ca. 2015, so it might not be real current.
-- Also, I don't know if the state maps' routings are consistent with signage in the field, or other info on where the routes actually went. I haven't looked at GMSV, which someone might've done already. When I passed through the Santa Fe area on my latest trip, I don't recall seeing any historic US 66 signage on NM 300 either confirming or disconfirming that the historic route followed NM 300 rather than I-25. On a previous trip, I drove NM 47 north of I-25 (including the former routing through downtown Albuquerque), and don't recall seeing any historic US 66 markers except for the Central Ave. route.