Those terrain spikes are a nuisance, not least because they appear from nowhere apparently at random and they are dependent on the pc that you are using. In all the many times that I've crossed that bridge on version 1 of the Cambrian (and that's quite a few), I've never actually had a problem there. Come to think of it, I've never had that problem anywhere on that route. However, they keep cropping up on version 2 from time to time, usually if I've been working on the terrain somewhere nearby. All we can do is make sure that we test everything thoroughly before release.
Looking at these screenshots makes me realise how much we've changed in version 2. I didn't recognise where one of them was taken at first.
In fact, all 3 locations shown here have changed significantly. I'll try to upload a few screenshots when I've got a spare minute.
Martin