Tadman wrote:
It is my experience with regard to industrial cases, semi-automation is a crutch that can lead to carelessness, and I feel the same about PTC. That is my fear - not relying on a machine, but relying on a human's reliance on a machine.
When people become overly reliant on it, that can be true. But when it's used as an aide and not allowed to become primary, it can help. I'd put things like calendar and task reminders on our computers and phones as a form of semi-automation that is an aide, not a crutch.
Imagine if an railroad engineer had a device that help him or her maintain situational awareness and could alert to upcoming speed restrictions even though it could do nothing to enforce it. Sounds like a current car GPS/nav system adapted for railroad use. Many modern nav systems can display the speed limit of the road you're on so doing the same for a railroad, even upcoming speeds (simpler given railroads have limited routing). Imagine you're moving a long at 79mph when your device alerts you: "Speed 30 mph in 2.0 miles; current speed 79mph" and then countdown to it. Or if there's an interlocking or control point ahead: "Interlocking 2.0 miles ahead; diverging route 25 mph; normal route 60 mph" and then the engineer, adding what signals are displayed, slows or not as needed. No enforcement but a reminder when situational awareness is lost. Fixing just loss of situational awareness incidents would, I believe, greatly improve safety.
The problem I see with where PTC is going is that it is designed to be a 100% solution. Yet as with just about everything else, the 80/20 rule probably applies where 80% of the mistakes PTC is designed to prevent can be done for the first 20% of the cost; it's just getting the last 20% that makes it so difficult. Yet rather than going the easier route and taking care of the low-hanging fruit, we go for the solution that will get the top fruit while leaving the low fruit unharvested for years and years.
Years ago, I was involved peripherally with a project for my non-railroad employer of that time that was designed to be all things to all of a major division of the company. It was extremely complicated and eventually, to use a phrase I like, collapsed under its own weight. A rather large investment went nowhere.
Unfortunately, railroads have traditionally been extremely slow to adopt new technology, even when it would be easy to adapt. I remember early in my short-lived railroad career back in 1979 sitting out by the pool at my apartment complex talking to a couple of young women. I noticed they had pagers and found out they were flight attendants on reserve (airline equivalent of extra board). But unlike railroads, which required extra board employees to be by a phone when legal to call, they could sit out by the pool provided they called immediately (for some definition of immediately) when paged. Meanwhile, railroads fought pagers and even got a labor board ruling that pagers did not meet the requirements of being reachable when on the extra board.