A hot August afternoon in 1970 and we're aboard a northbound SCL Florida service train en-route from Clearwater FL back to NY (the Silver Star, as I recall). Somewhere north of Tampa our train's pace slackens until we reach a full stop. At the head end a hand-thrown turnout is reversed, and we ease into a passing siding and once again come to a full halt.
From the dutch door all is quiet on this sultry day, with only the cicadas to be heard, until in the distance an air horn sounds. Seemingly in just a moment the headlight can be seen down the track and a southbound passenger train (the Champion?) slams by at speed.
A minute later we are easing forward back onto the main. A brief pause for the rear brakeman to re-align the siding turnout to the main and then we are off again. All without signals, PTC, GPS or any of the other modern conveniences.