Do these still need to be remade from scratch? There was a fix and several ones that I tested back then just needed to be selected and built again, though in some cases you needed a restart for full effect.
All the other roads spikes in various locations were fixed by this update, by simply moving a bit some roads nodes or simply reloading it.
But around LFNA... It's an other story.
Even after having selected and removed all the roads around the spike, it's still here. I can't see if there is a broken road here, one node deep under the ground, an other far in the air, because I can't select anything here.
It's obviously not a terrain bug, because the spikes are not here with an empty cache.
Sounds like a lot of work........
Think again about if it's worth it then, if so, take your time.
It's ok. Buildings are not stored with the roads, so I won't have to replace these