py_megapixel
Established Member
I've read on here that the Passenger Information System (PIS) on Metrolink M5000 vehicles works by measuring distance between stops but I'd like to know some more details.
Firstly, does the PIS "know" everywhere that the tram will stop on the way to its destination, or does it just know what the next stop is, and then when it arrives there it works out the next one? The reason I ask is that it doesn't ever seem to provide a full list of calling points.
Secondly, does the distance measuring work on the basis of distance from the origin of the service, or does it reset at every stop? (As in, if a tram starts at A and stops at B and C on the way to D, does it work out when it's approaching C based on the distance it's travelled from A or from B?)
Thirdly, is there any GPS equipment onboard with which to perform a sanity check (for example if a tram skips a stop does it know or does the system get out of sync?) or does it entirely rely on measuring distance?
Finally, is the PIS integrated with the doors at all?
Any other interesting details about the PIS on these vehicles would also be welcome.
Firstly, does the PIS "know" everywhere that the tram will stop on the way to its destination, or does it just know what the next stop is, and then when it arrives there it works out the next one? The reason I ask is that it doesn't ever seem to provide a full list of calling points.
Secondly, does the distance measuring work on the basis of distance from the origin of the service, or does it reset at every stop? (As in, if a tram starts at A and stops at B and C on the way to D, does it work out when it's approaching C based on the distance it's travelled from A or from B?)
Thirdly, is there any GPS equipment onboard with which to perform a sanity check (for example if a tram skips a stop does it know or does the system get out of sync?) or does it entirely rely on measuring distance?
Finally, is the PIS integrated with the doors at all?
Any other interesting details about the PIS on these vehicles would also be welcome.