Hopefully there is at least one Forumite who is familiar with this track from Montreal, across Maine, to St. John, New Brunswick.
I believe that, back when Canadian Pacific originally owned it, there were block signals, at least on the United States portion of the line. The horrible runaway at Megantic a few years back, revealed that there were no signals on that portion, but the passenger train that used to run to St. John may have had something to do with block signals in the U.S., because of the requirement that a signal system must be in effect to run at 60 MPH or greater on passenger, and 50 MPH or greater on freight. This does not apply in Canada.
I am wondering, first, if there were ever any block signals, and second, if so, whether they are still in service.
Thanks in advance to anyone who can furnish information.