@George Harris
Here is a link to a SP timetable from 1941. It shows the routing your mother-law probably would have taken.
https://streamlinermemories.info/SP/SP41-12TT.pdf
Yes! Thank you very much.
Looking thorough it gives you an idea of what long distance travel would have been like at that time. I suspect her trip was probably a couple years later, but seems reasonable to think the schedules would be much the same. For those that don't want to hunt it up, you have trains 362-44 on the SD&AE to Yuma, then train 6 on the SP. Since the equipment says through coach San Diego to El Paso at least she did not spend a few hours in the middle of the night in the station at Yuma with three small kids. The kids were probably 7, 4, and 2 at the time she made the trip. Train 6 had through coaches Los Angeles to New Orleans, so she could probably have moved to the New Orleans car without getting off the train. Here you have it:
Train 362-44
5:15pm Lv San Diego
12:40am Ar Yuma AZ (Pacific Time. this is just past midnight)
Eleven stops plus five flag stops in 218 miles, 7 hours 25 minutes, average 29.4 mph. It was the miles in Mexico in the middle of the night that creeped her out.
Train 6 - apparently this train did not go through Phoenix.
4:15am Lv Yuma (Mountain Time, so 2 hours 35 minutes dwell by schedule)
10:35am Ar Tucson
11:02am Lv Tucson
7:35pm Ar El Paso (605 miles from Yuma via Phoenix)
8:30pm Lv El Paso (Mountain Time)
3:10pm Ar San Antonio (Central Time)
7:30am Ar New Orleans (Central Time) (1,117 miles from El Paso)
1,722 miles, 50 hour 15 minutes on the SP, average 34.3 mph
Total so far, 62 hours 15 minutes for 1,940 miles from San Diego, average 31.2 mph (including all dwell time)
Now I am going to hunt up the L&N time and correct the SP distance for Phoenix bypass. Will just do as edit to this post if I find it quick enough. 1941 SP TT shows connection to Jacksonville leaving New Orleans at 8:45am, which would be through Pensacola.
L&N distance, 243 miles, time in a 1950 timetable that appears to be similar to the 1941 SP TT connection, but having a 10:55am departure, takes 6 hours 40 minutes, for average speed of 36.4 mph. (Remember, there is no direct line between Mobile and Pensacola. The junction is at Flomaton AL, rail distance 103 miles Mobile to Pensacola versus about 50 by direct highway.)
Thus, we have an end to end trip distance of 2,183 miles and a trip time, 8:45 plus 6:40 = 3:25pm giving an overall time of 70 hours 10 minutes = 31.1 mph. Three nights plus three days. Not exactly light speed, but probably better than bus or driving time for the 1940's.