Interesting - I was there on Saturday. Next time I'm there I'll have a shufty.
BUT There used to be a henge where the Lowther gate is (see Fitz's pic on TMA), that's maybe why the road bends. And don't all the local illustrations have just the two?
Not trying to be negative here..!
I wonder what the surrounding area to the west looked like before the motorway was put through? Was it flat or a hill? Hard to tell with modern embankments.
.o0O0o.