I put something together for the old alignments of US 40, the North Lincoln Highway and Victory Highway in Newcastle. The original alignment through Newcastle would have followed what is now Old State Highway through the 1910 Newcastle Subway (possibly the first State Highway Rail Subway in California). US 40 was realigned through Newcastle Tunnel and Taylor Road circa 1932:
https://www.gribblenation.org/2022/01/former-us-route-40-north-lincoln.html