Rigid Haul Truck
This is the truck most surface mines use. It is called Rigid as the front and body of the truck are one whole unit and they rear wheel drive. They achieve faster haulage on flat surfaces and are designed for longer hauling ramps. It also has the capability of carrying larger/heftier loads.
Moxy / Articulated Truck
This truck is used mainly underground on mine sites and can be used on civil sites (though some mines do use them in surface mining). They are purpose built trucks that are able to go over rough terrain to get the job done. The vehicle usually has all-wheel drive and consists of two basic units: the front section, generally called the tractor, and the rear section that contains the dump body, called the hauler or trailer section.
Generally this role requires you to assist the tradesmen by: ensuring they have the required tools. Assisting them with the tasks required. Driving them around site