over length in most states

More than likely you will never be pulled over. But if you are in an accident you will be fined then. Or commit a moving violation you will be fined. Or if there is a random road block-search you might get it.

Agree with "Wadcutter". Used regularly, especially when obvious and the officer has a bit of commercial training and a long tape measure.

Road officers generally avoid most commercial enforcement other than moving violations because it is too complex and very dirty.

I'm retired state police. LE frequently pull over overlength vehicles and cite. In addition the driver has to make legal which usually means dropping the 2nd trailer.
Just because no one on this forum has seen it doesn't mean it doesn't happen. There's a lot of law violations that are stopped everyday that few if any see happen. That doesn't mean they don't occur. Even if someone did see an RV combo stopped they wouldn't know what the stop was for.
It's a fairly common stop. During the spring, summer, and fall seasons Troops from just my district would stop several every week.
Contrary to Ralph's "little research"it is very often the primary reason. Overlength vehicles are easy to spot.

Darn, 33 years on the California Highway Patrol including time as a commercial unit supervisor and I called it the wrong thing for all those years as did and still do the current officers.

Explain why it is called triple "towing" when only two vehicles are being towed.

Explain why commercial drivers license endorsement says doubles towing. There is also an endorsement for pulling three commercial trailers in states where it is legal, and amazingly it is called triples towing.

so far no ones ever been pulled over for it

oldchief7155 wrote:
Not to nit-pick but you're talking about double towing, not triple. You only count the towed vehicles, not the towing vehicle.

Just makes it easier to get correct info.

You got the right answer. Entire length of combination of vehicles from very front to very rear when hooked up and ready to roll.

I knew this was going to come up, on the site "towing world" every state lists it as triple towing

Not to nit-pick but you're talking about double towing, not triple. You only count the towed vehicles, not the towing vehicle.

Just makes it easier to get correct info.

You got the right answer. Entire length of combination of vehicles from very front to very rear when hooked up and ready to roll.

I have done a little research on this and "length" is seldom a primary reason for the traffic stop.
Usually it's added on to what-ever the violation lead to the primary.
Why, is they can then prevent you from accepting the ticket and driving away. If you are over-length, you had to unhitch and arrange to have the extra length "tow" moved

If you don't stop, they can't measure. :)

It's the distance from the nose of your truck to the end of whatever you have on the tail end. Overall length. Why would it be anything else? Assuming your truck is 24 ft + your 38 ft 5ver -4 ft of overhang = 58 ft.

That leaves you 7 feet for everything else on the tail. Whoops miscalculated but fixed it. Just guessing but the fines, if caught, may fall under the commercial trucking zone and they are very high.