Location #1: Cross Roads
Roughly at what is now 11321 National Boulevard, Los Angeles, California, United States
Location #2: Joad farm
This is a studio backlot / movie set
Location #3: Driving through..
Albuquerque, at Central Avenue Southwest & 5th Street Southwest, Albuquerque, New Mexico, United States
Location #4: Then
Main Street, Sayre, Oklahoma, United States
Location #5: Martin’s Service Station
Route 66, Santa Rosa, New Mexico, United States
Location #10 Grapes of Wrath appears to be US 66 inspection station Daggett CA. Santa Fe RR tracks and telegraph lines to the right are a clue. UP RR tracks from Yermo joined up there and on into Barstow and Cajon pass into LA. US 66 and US 91 from Las Vegas followed these tracks. It was modernized a few years later. Now of course I-40 and I-15 are there. Inspections too. But the Joads got across. Excellent site you got here,just found it.