Display overlapping/shared route segments side-by-side on map

[mbjackson-capp]

Consider "polyline offset" or a better-maintained analogue https://gis.stackexchange.com/questions/291745/displaying-overlapping-polyline-segments-as-multiple-lines-with-offsets

Alternately (my hunch is this would be much more difficult), consider some in-backend operation that finds overlapping segments of polyline so that tooltip for those sections with multiple lines running along them bring up all lines in that segment

[mbjackson-capp]

Demo suggests this may have to involve slicing routes into between-stop segments