Thank you for your help on this!ORL = Orlando, Florida station
SM = Silver Meteor train
SS = Silver Star train
WAS = Washington, D.C. station
CL = Capitol Limited train
CARD = Cardinal train
LSL = Lake Shore Limited train
CHI = Chicago, Illinois station
SWC = Southwest Chief train
KNG = Kingman, Arizona station
LVS, LAS, or LVT = Las Vegas, Nevada bus stops
CZ = California Zephyr train
RNO = Reno. Nevada station
The times are 24 hour clock times, just like most every other country in the world uses for printed schedules, as it avoids any confusion between am and pm. Any time greater than 1200hrs is between noon and midnight, so if it says 1606hrs just subtract 1200 (12 hours and no minutes) and add a pm: 1606hrs - 1200 = 406 pm or 4:06 pm.
Most Americans (except GIs and ex-GI's) are Neanderthals when it come to these sorts of things, including dates. Here in the US and a small handful of other countries, our next Independence Day is said to be on 7/4/21 or perhaps 07/04/2021 which leads to the ambiguity "is 07/04 the 4th of July or the 7th of April?". Long ago the US military avoided all ambiguity by adopting this format - 4 Jul 2021 - but I don't know if this is still used in the computer age. The ISO 8601 date format of YYYY-MM-DD or 2021-07-04 eases computerized sorting and also has a logical sequence of sized units of time.
But heck, this is America: the land of the free and the home of the brave, eh?