I seem to recall that I may have played with a work around of seeking
a proximate non-timepoint bus stop for one end of the trip or the
other. If I remember correctly, it "worked" if the estimated time at
the second, or second-to-last bus stop was very close (i.e. 6:00:59
would show the same as the 6:00:00 scheduled departure, or
6:54:13/6:54 was close enough for an actual 6:55:00 arrival). In that
regard, it was then just the matter of defining the timepoint as this
substitute bus stop location, as opposed to the actual - for that
particular route number.
Tim Sobota
Metro Transit, City of Madison