by diburning
The airport tram in Hong Kong does that too.
I think the problem with such a system is that at this point it would be too expensive.
The gates themselves cost money, and all of the operators would need to be retrained to spot the train at a specific spot (right now, close enough is good enough as long as all the doors are on the platform).
Not to mention that there might be some sort of safety issue involved in case of a disabled train (We probably have more stringent safety laws here)
OPTO on the red line seems to be working now. Station dwell times are a bit longer than before, and it did change the (observed) headways a bit, but things are running smoothly now.
I think the problem with such a system is that at this point it would be too expensive.
The gates themselves cost money, and all of the operators would need to be retrained to spot the train at a specific spot (right now, close enough is good enough as long as all the doors are on the platform).
Not to mention that there might be some sort of safety issue involved in case of a disabled train (We probably have more stringent safety laws here)
OPTO on the red line seems to be working now. Station dwell times are a bit longer than before, and it did change the (observed) headways a bit, but things are running smoothly now.