This ATS mod alows triples, B-doubles, turnpike and rocky mountain doubles to be used in any state.
All ownable and freight market trailers will be usable everywhere, including long-wheelbase 53ft trailers in California.
Not all freight yards are big enough for these trailers, so only jobs with compatible start & end points will have all the options.
Should work in all versions of American Truck Simulator. The Freight Market SCS Turnpike Doubles ATS mod should also be in your inventory. Check it out.