Truck Traffic Pack mod was updated to 1.4.2 for American Truck Simulator 1.6 version.
Download Trailers and Cargo Pack 1.3.1 mod by Jazzycat for 1.6 ATS.
Download Painted Truck and Trailers Traffic Pack 1.0.2 mod by Jazzycat.
And here is version 1.0.1 of the Military Cargo Pack mod made by Jazzycat for ATS.
And here is version 1.1 of the Bus Traffic Pack mod made by Jazzycat for ATS and tested on 1.6 patch.