Multiple Trailers In Traffic v6.0

Bottom dumpers: Pup double, Rocky Mountain double, pup triple
Box vans: Pup double, Rocky Mountain double, Turnpike double, pup triple
Curtainsiders: Pup double, Rocky Mountain double, pup triple
Dry bulk tanks: Pup double, Rocky Mountain double, pup triple
Flatbeds: Pup double, Rocky Mountain double, Turnpike double, pup triple
Insulated vans: Pup double, Rocky Mountain double, pup triple
Reefers:  Pup double, Rocky Mountain double, Turnpike double, pup triple
Truck transports

Box vans, curtainsiders, insulated boxes and reefers come with a variety of SCS paint jobs; if you're using a real companies mod, for e.g. those done by Grimes or Shirblackspots, then the default SCS skins get replaced on the trailers in this mod too.  Flatbeds come both empty and with assorted cargos.

You'll only see the turnpike doubles in Nevada, Utah, Oregon & Washington (if you have the appropriate DLCs) unless you use C2C and/or Canadream.  This version won't work with anything older than ATS v1.36, but no longer requires the Heavy
Cargo DLC, coz that's now in a separate addon.

Short (STAA) double trailers and heavy cargos will appear everywhere (including Mexico)

Triple trailers will appear in:
Colorado
Idaho
Kansas
Montana
North Dakota
Nebraska
Nevada
Oklahoma
Oregon
South Dakota
Utah
Washington
Wyoming
The Prairie Provinces of Canada (because I've seen a couple in Alberta)

Rocky Mountain Double trailers will appear in:
Colorado
Idaho
Kansas
Montana
North Dakota
Nebraska
Nevada
Oklahoma
Oregon
South Dakota
Utah
Washington
Wyoming
Canada (all of it)

Turnpike Double trailers will appear in:
Canada (also all of it)
Florida
Idaho
Indiana
Kansas
Montana
North Dakota
New York
Nevada
Ohio
Oregon
South Dakota
Utah
Washington

Updated for v1.36