CA US66HisHol/CA US66HisAzu:
What's the deal at the west end of CA US66HisHol? US 66 never went that way; it always turned down Lincoln to end at Olympic.
As of December 2017 this was backed up by signage, along with
an end sign at Olympic.
How was it decided what route CA US66HisHol would follow through LA? I can't find any signs on the Goog, but if you're going for the longest-lasting alignment, that would be Sunset-Figueroa, then onto the Arroyo Seco Parkway to Pasadena. Pre-freeway (opened 1940!) it used Figueroa (partly repurposed for the freeway through Elysian Park) all the way to Pasadena. If it ever used Broadway to Mission, that was before 1934 (at which time the route was San Fernando-Eagle Rock-Colorado).
I did find
two signs at Figueroa and Colorado. So unless anyone has a good reason for a different alignment (such as signs I missed), we should change it to turn off the current route at Sunset and Figueroa, north on Figueroa to SR 110, then overlapping SR 110 between 24B and 26, then taking over CA US66HisAzu.
CA US66HisCaj should also be combined with these two, now that Cajon Boulevard has been built across I-15.