Unrelated to the split -- looks like there's nothing wrong with this; it's just uniquely weird:
https://travelmapping.net/hb/showroute.php?r=ita.ss027var&lat=45.771953&lon=7.305458&zoom=17
This route looks like it's unbannered SS27 (Variney), as opposed to a Variante without an Abbrev.
That makes it SS27Var, which ends at... SS27Var. A Variante. This is a normal waypoint label, as it's standard to leave off Abbrevs from labels unless needed to disambiguate.
Unbannered SS27 picks up again on the other side. Is this similar to how A1 will become A1(M) for a while, or IRL M6 becomes N6?
(What's the difference between Var and not? Anything related to this SS 27 -> SR 27 signage change?)
South of there:
ITA SS27Var ends at T2, but there's no corresponding route in the HB though it's signed down south.
E27 is missing a point here or here or wherever you decide the correct coords are.
A Variante is an upgrade of a road on a different alignment. The "variante" suffix pops up when owners of the original road and the variante are the same entity, typically the State through ANAS.
It goes like this. Road SSxx need to be upgraded on a different alignment; ANAS builds it and the new one becomes SSxxVar. Then several scenarios open:
- it stays like this;
- the original road is transferred to provinces, which may or may not rename it. The SS is always lost, but it can get SP, SR, SPexSS SP_provincecode...
- if the original road is transferred, the variante may or may not get renamed to the original road name. That happened for instance with SS76: the original road was called SS76, when the superstrada was built in the 70s it was transferred to the province and called SP76, while the superstrada got the original SS76 name.
Regarding the example of SS27, it seems that in the website database SS27var is wrong. According to ANAS website, SS27var basically ends at the town of Gignod and ends at the current SS27Var waypoint, while the rest belongs to SS27:
SS27:
SS27var: