Gives reefer and insulated trailers the ability to haul dryvan cargo
Allows dryvan and reefer trailers to haul ADR (hazardous) cargoes otherwise reserved for curtainsider trailers*
Allows curtainsiders and sideboard flatbeds to haul most flatbed cargo types, as well as new sidedoor trailers**
Lets lowbed trailers transport selected flatbed cargo types, and flatbed trailers transport selected lowbed cargo types
Adds new body types for sidedoor box trailers, walking/moving floor trailers and curtainsider reefer**
Cargo support for ATS body types dropdeck flatbed, chipvan, and hopper trailers**
Fixes how some heavy machines and other cargoes are loaded on lowbed trailers, such as properly oriented excavators and other heavy machinery***
Disables unnecessary width extensions on lowbed and lowloader trailers on cargoes that should not have them

Most of these changes also apply to modded trailers, as long as they use a vanilla body type (like 'reefer', 'dryvan', 'lowbed', 'curtainside' etc.)
This mod can be used in Convoy as an optional mod. It is possible to haul cargoes in multiplayer, and the cargo will be visible to other players without the mod. Changes to how cargo is loaded on the lowbed trailers will not be synced with players who do not have the mod though.
World of Trucks (External Market) jobs are generated by SCS servers and will only offer default cargo selections, even with this mod active.
This mod does not add any new types of cargo, it simply makes existing cargo available for more appropriate trailer types.

*ADR signs only supported on certain vanilla and DLC trailers.
**New body types require trailers specifically designed for this mod. Extra addon required. Not all new body types are actively used but are made available for mod creators.
***Lowbed cargo orientation change only for SCS trailers and DLC trailers, and modded trailers using bodies from these. Not all cargo has been adjusted due to game limiations.

In the cargo def files added support for some new custom body_types as well. 
This includes among others dropdeck and hopper from ATS (useful if you're running any mods that add trailers from ATS to ETS2, or if you have other mods that add similar trailers in ETS2), sidedoor and moving floor trailers (allowing more fitting cargo for sidedoor and moving floor trailers) and some other things.
The addition of these for now allow other mods to have more suitable cargoes available.

Credits: Smaen