2 ms·
The existing track circuits do not provide the same flexibility and traffic density that PTC can allow. In the 1920's there was a Fireman and Engineer on the fr
by nickhalfasleep 9y ago
The existing track circuits do not provide the same flexibility and traffic density that PTC can allow. In the 1920's there was a Fireman and Engineer on the front end, and a Conductor and Brakeman on the caboose to check the signals and timetables. These days there is just one engineer. CTC won't dump the brakes when a train overruns it's ownership of speed, track, or time. PTC will.