This question is specifically about the non-cab signaled Framingham to Boston section of the ex-B&A line, but feel free to answer for other systems / lines.
Understanding that a dispatcher can neither see nor control the automatic signals, can a dispatcher specify the aspect of an absolute signal at an interlocking? Put another way, if a dispatcher lines the switches so that a train can proceed through an interlocking, is the signal aspect then automatically displayed according to the block or interlocking 'program' or 'rules?' Or could the dispatcher align the switches such that the train should / could see a clear signal, but the dispatcher manually changes it to slow clear (or something else) to run the train slower (for some operational reason)?
Understanding that a dispatcher can neither see nor control the automatic signals, can a dispatcher specify the aspect of an absolute signal at an interlocking? Put another way, if a dispatcher lines the switches so that a train can proceed through an interlocking, is the signal aspect then automatically displayed according to the block or interlocking 'program' or 'rules?' Or could the dispatcher align the switches such that the train should / could see a clear signal, but the dispatcher manually changes it to slow clear (or something else) to run the train slower (for some operational reason)?
"Twitter Dave"
Engineering Manager, MBTA
MY POSTS HERE ARE UNOFFICIAL and are my own personal opinion. My posts are not official MBTA policy or communications.
https://twitter.com/FramWorMBTA
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MBTA schedule archive: http://www.dbperry.net/MBTA/
Engineering Manager, MBTA
MY POSTS HERE ARE UNOFFICIAL and are my own personal opinion. My posts are not official MBTA policy or communications.
https://twitter.com/FramWorMBTA
http://FramWorMBTA.weebly.com/
MBTA schedule archive: http://www.dbperry.net/MBTA/