Rocky Mountain doubles lcv combo ?

RMD's are 41 meters on four lane and 31 meters on designated two lane in Western Canada.
Given that answer, then what exactly is a RMD? A 53' and a 48' would qualify as such on four lane highways. Right?

 

Depends on your definition of "Rocky Mountain Doubles". In the US, it's a 48' 2-axle trailer and a 28'6" single axle pup on a single axle dolly. A 53' and a 48' would be a Turnpike Double (or, en Quebec, a Train Routier).

 

I’m an lcv instructor. It can be any combination longer than 82 feet, to the limit of the provincial permit. The most common is a 48 or 53 foot trailer with a 28’ pup, just because most companies use 28’s.

 

I am an LCV instructor also, in Alberta. A RMD maximum length is 41 Meters on four lane. A 53' and a 28' would need a really long wheelbase tractor to get to 41 meters.
I have come to the conclusion that it is any two trailers that have different lengths.

 

Yes you guys have the 2 and 4 lane thing. Forgot about that.