Wayside defect detectors check passing trains for hot bearings, dragging equipment and the like, and announce the
result on the railroad's road channel. RailSpotting receivers hear those announcements, and a train that passes one is
placed on the map at that milepost.
This is the list RailSpotting posts announcements from: 34 detectors, 2 of them already heard by receivers.
Entries from the reference list come from public hobbyist sources and may be out of date or off by a little;
their milepost is corrected once receivers hear them. A detector receivers hear that is not on this list is checked against real
trains for a week and reviewed by an admin before its announcements are posted.
