Dull and wet.
Rhytidiadelphis squarrosus (LHS) is a common pleurocarpous moss on acid soil, so I expected to find it here. What I didn't expect to find in the same location was Rhytidiadelphis triquetrus (RHS), which likes lime. Maybe the gravel used to make the road is lime-based.
And here's a close-up of the shoot tips.
R. squarrosus (L) and R. triquetrus (R, borrowed from 23rd.)
Overall, R. triquetrus is a much more robust plant.
I just realised it's the moss I found all over the place at Lough Erne. That's on lime.