Towed Trailers

[Judge Holden]

Hey, guys. Long time lurker - first time poster.

Trailers weight 0.5 tons, and can carry 1 ton.
Any vehicle except for a motorcycle can pull a trailer.

Does this towed trailer count against the vehicles load limit?
If so is it 0.5 tons? or 0.5 tons plus cargo?

What about the vehicles towing speed and fuel efficiency?

I've searched the forums and can't seem to find anything on it. If I've missed something please point me in the right direction.