Twisty trailer!

Please tell me you're being sarcastic!

You do know that's 2 trailers in the picture......... don't you?

The message from "SimonJ" contains these words:

On closer inspection - I do now! Not terribly clear, is it?

Nah, it's a modular system, you just add more as the need arises. The limit is reached when you can't go right round a roundabout without using more than one lane.

The message from Willy Eckerslyke contains these words:

Dunno - it'd depend where the attachment on the preceeding trailer was. With care you should be able to make them do a really nice road-train act and follow along nicely.

There was a type of trailer used in depots when I was in the army, which was a four-wheel trailer, both axles pivoted and a rod just like a track rod ran from front left wheel to rear right wheel. This meant a depot tractor could tow several trailers and all would follow the same wheel tracks without cutting corners. Interesting to watch it threading through piles of pallets.

Steve

It doesn't matter how much care you take. If your train's 300m long, you're going to get stuck trying to go more than 360 degrees round a roundabout with a 200m circumference.

The message from "shazzbat" contains these words:

That'd depend on having each draw-bar attached to the axle so it could initiate the whole thing, wouldn't it? Not that that's a problem.

Why would you go all the way round and past where you entered?

To check whether you had too many trailers on, of course - do try to keep up!

Usually because of crap road signs (not that I make a habit of it!), but I like Ian's answer better.

The message from Willy Eckerslyke contains these words:

It's better than reversing round the roundabout 'cos you've missed an exit. Like I saw someone doing at the South Mimms roundabout on the M25 not long ago in heavy traffic. That was seriously scary.

I've also seen people reversing up the Hangar Lane underpass and round the gyratory system, too.