^Honestly, I'm not a fan of cheap cargos like logs or wooden chips, but the logging industry (since the Washington DLC came out) provides another types of cargo which I like — various forest machines, especially
with their own wheels — at least, they don't need huge «oversized cargo» lowboys and have an interesting look.
Speaking about off-road trails, there is another idea — after dirt roads, how about grass ones?


And I can say I hope they will remade a 53' fuel tank trailer — since after 1.32 it became forbidden in California*, the deliveries to
Gallon Oil depots in this state are less profitable than earlier (and other states have much less fuel bases) because players now can choose only the short two-axle tank trailer. Thankfully, the 53' propane tank trailer is still in business — and I very like its smooth sausage-looking shape

.
*three-axle chassis with
third liftable axle is legal, but this trailer can lift only
first axle.
The old Genoa bridge is quite dated, but cool looking. See and read about it here. Wikipedia page.
The most awesome part in replacement bridge is that its hollow body will be maintained with a help of robots

,
as this article says.