Opinions...? I have travelled 395 from Cajon Junction to Ridgecrest in my MH several times. Kind of a boring ride. However, never have I driven the 138 for the same destination. I have, howeve...
I agree about the lack of courtesy on 395 between Adelanto and the 14, plus I agree that the 138 does not go directly to Ridgecrest and one must use the 14 from there.
I believe the 138 route is about 40 miles and an hour longer. However, I believe it is flatter for the most part. I don't remember if it is still only one lane each direction or has it been widened since 40 years ago.