Here's another goodie:
Highway 17 between Antrim & Arnproir is a complete floating stub and disconnected portion of Highway 17. Yet it's still signed as Highway 17 even though Highway 417 runs parallel to it. I understand it's a phased expansion of Highway 417, so everything is within the last 10 years.
At the north end of where Highway 17 "ends" in Arnproir, you have a Highway 17 ends tab, and on the same pole, you have a "TO 417" and better yet, a "TO 17" tab.
https://www.google.ca/maps/@45.425081,-7...FcF8wHileMpR-O1UIcJJA!2e0!7i13312!8i6656
So you're telling me highway 17 "ends" here, but if I turn here, I can keep going towards Highway 17? But I thought it ended, meaning I'm as far east or west as I can possibly on the route. (in Ontario, there are now multiple highways that now have a gap in them. Highway 3, 4, 7, 8 are ones I can think of quickly)
Why not remove the Highway 17 designation in its entirety, and in this case, download the road, and if that's not an option, designate it as a 7000-series highway, meaning, the highway has no formal number. Perhaps its in progress, but looking at Google Maps and Streetview, it's been this way for a number of years already.