In reply to Simon Lee:
the issue is whether you think partially blocking the road by the stream is inappropriate or not, and what may happen if climbers continue to do that, if any sanction could be taken, maybe it can't, maybe it's a non-issue beyond risking your wing mirrors.
personally I think you can squeeze about three cars on the side of the road without it being dangerous. obviously some people don't think it's an issue, and park up to 8 cars there.