Features Update 1.55 for ATS:  

Gameplay
- 🏫 Driving Academy - Truck Driving Proficiency
- 🗺️ Map Improvements - "My Location" Hotkey

Map
- 🌽 New additional content for the Nebraska DLC - US-20, US-81, US-75 & the settlement of Laurel

Vehicles
- 🆕 Fifth Generation Freightliner Cascadia Update
- 🚚 Kenworth T680 Update
- 🎨 FlowBelow Painted Parts
- 🚜 Farm Machinery DLC Update

Visual
- 🌆 Custom city intros for New Mexico DLC
- ✉️ Mail UX redesign
- 🧰 Options QoL Improvements - Graphics settings visualisation

Other
- 🏆 Steam achievements update with text and icon improvements
- 💾 Save manager improvements
- ⏳ Asynchronous loading

Features Update 1.54 for ATS:   
Gameplay
- Cargo System Redefined
- Driving Academy Rewards

Visual
- Truck Adjustment Menu Redesign
- First Launch Screen Flow Refresh

Vehicles
- Lode King & Prestige Trailers Pack bug fixes

Other
- PhysX Implementation

Features Update 1.53 for ATS:   
Map
- California Rework - Phase 4 release

Gameplay
- Dynamic cargo loading & unloading of logs available throughout the USA
- New Special Transport route from Los Angeles to San Diego
- Raised speed limit for Special Transport jobs from 40 mph to 55 mph

Vehicles
- The new Fifth Generation Freightliner Cascadia® added to Driving Academy
- Fully functional sliding tandems and fines system

UI
- Visualization of changed options in the settings
- Smooth and Auto camera centering

Features Update 1.51 for ATS: 
Map
- I-44 update for the Oklahoma DLC
- Vegetation update for the Texas DLC

Gameplay
- Dynamic cargo (un)loading of grain hoppers
- Automatic differential lock option
- Automatic blind spot sensor option

Vehicles
- FlowBelow update for various trucks
- Mack Black Anthem added

UI
- New Title Screen
- Search bar added to the settings menu
- Accessibility and Interface categories added to the settings menu
- Improved changing of desktop background
- New Controller Config

Visuals
- Enhanced interior cabin shadows in the truck cabin