having just watched the aerial shot again, i don't think the barriers come in. it's an illusion created by a painted white line in the road, that disappears towards and under the barriers, therefore, it's not the barriers that close in and make the road narrower, they are just taking it in a different direction, it's Cav himself. it does seem like he does cut off Thor's line.
Just seen him on TV and he seems a bit subdued.
Just seen him on TV and he seems a bit subdued.