But why though? Correct me if I am wrong, but weren't trains still running without Central Door Locking (CDL) around 10 to 15 years ago? And trains used to run at 100mph plus for many years without CDL. Likewise, TPWS is something that has only appeared since privatisation.
How come slam door trains with no locks have been fine since the age of steam and yet now they are unsafe? How come trains used to run at 100mph plus with no TPWS and it was safe, and yet now it isn't?
I appretiate the need for railways to be safe- we are, after all, talking about several hundred tons of metal with a few hundred passengers onboard so the risks are very high, but it's not as if we are going back to regulating trains with a policeman! The ways that hertiage railways signal their trains is the same way that it has been done for over 100 years, and a few National Rail lines in the UK still use the same methods today.
The only system that I would feel would be required to fitted is AWS as it was invented and installed during steam days.
Can someone explain to me why CDL expecially is such a problem these days? Could prominent warnings and disclaimers on doors and railway timetables be a solution:
DON'T attempt to open the door while this train is in motion. The railway CANNOT be help responsible for injury or death occuring if you fail to observe this notice".
I have been looking at hertiage railways online for the past week or so (thanks to the NYMR's 40th Anniversary Gala that I sadly couldn't attend

) This has been a question that I have been wanting to ask, so I'm glad the topic came up!