>Do your artic travel down the road in convoys? tailgating each other, riding in each others slip stream? 10 or 20 in a row? I saw a convoy this summer in canada.

You do sometimes see them in groups but I don't think convoys are such a big deal hear. There was quite a funny rip off of the "Convoy" song years ago with names like "plastic chicken" and "rubber duck"
http://members.tripod.com/~Cybertrucker/convoygb.htm
- I suspect we're not so good at taking these things seriously.

Here's a "sad" story (Eddie Stobart is a haulage firm - there was a thing about honking your horn when you saw them a few years ago):

http://www.shropshirestar.com/news/july02/26th/stobbart.asp