The truck and the trailer are fully loaded with 3500 gallons of fuel each.
The tires on the trailer are a little bit too soft.
I used Truss Physics for the Tires : http://forum.unity3d.com/threads/released-truss-physics-for-unity3d-soft-body-simulation-plugin.349503/
I also used Truss Physics for the Truck Front Leaf Springs, Trailer Leaf Springs, for the Rear Suspension Airbags, for the Truck Rear Leaf Springs, for the Mudflaps and for the Truck Frame so it can twist.
For more info about Unity Engine visit the official website: https://unity3d.com/
My System Specs:
- CPU: Intel Core i7-4790K Processor 4 GHz
- Graphics Card: GIGABYTE GeForce GTX 970 OC WindForce 3X
- RAM: 12GB RAM