The 129/130 overlap has always been a wibbly-wobbly
"is and is not" kind of affair. The signage you describe goes back to ~2007 at both locations, the green one S of School St being a more recent (2015-2018) replacement.
Endpoint info came from
RoadsAroundME. When Cameron Kaiser developed the site, he got route logs straight from MDOT.
https://www.floodgap.com/roadgap/me/r?129https://www.floodgap.com/roadgap/me/r?130Terminus of Main St and mileage match the HB.
Shapefiles:• medotpubrds.shp dated 2019-05-24 indicates a overlap.
• MaineDOT_Public_Roads.shp dated 2020-11-19 has changed the format of the data; it's not evidenced, not ruled out either.
With the disagreement between the different sets of signs, I let the route log be the deciding factor.
Though I suppose a "missing TO" argument could be made for signing ME130 from US1Bus?...
It's almost like MDOT never bothered completely getting hip to their own route changes...
Absent any clearer info, I'll probably just no no-build here.