Construction The primary use of the WorkStar is as a heavy 6x4
dump truck with a GVWR of approximately . With all the upgrades possible, it can be used as a concrete mixer, where the heavy duty front drive axle is often used. It can also be a semi-tractor, pulling dump or lowboy trailers.
Fire equipment. In rural areas of the US, especially in state and national parks, fire equipment has to go to remote off-road areas, often carrying water with them. The WorkStar has options needed, high strength and power, heavy duty front drive axle, an advanced electrical system, and a crew-cab. An extreme truck can be ordered with factory parts.
Railroad maintenance. Railroad equipment is very heavy, and the track needs maintenance its whole length, no matter how remote. The WorkStar's chassis can be ordered to mount
road-rail pilot wheels, which let the truck run directly on the tracks. Racks can be mounted outside and above the cab so the truck can self-load and unload sections of rail onto them. The crew-cab is often used, and the truck also carries a large amount of tools and equipment.
Street and road maintenance In the northern US snow is a problem for roads, which need to be plowed and salted. Built with wiring and controls for lights and equipment, body options like heated windshields, mirrors, and seats, the truck comes ready for the service from the factory. The strong chassis with heavy-duty front wheel drive can plow around the clock for days.
Utilities The WorkStar is popular with utilities, who often work off-road for long periods in bad weather. The front driven axle is very useful when the truck is moved to many different sites. The strong frame adapts to outriggers and a long boom, so employees can work on overhead wires. File:FEMA_-_39758_-_Water_truck_at_a_burned_area_of_Colorado.jpg|Fire tank truck File:FEMA_-_27673_-_Photograph_by_Michael_Rieger_taken_on_12-20-2006_in_Colorado.jpg|Snowplow with spreader body File:International WorkStar Sewer vacuum truck.jpg|Sewer vacuum truck File:Camion_poubelle_Montreal_Col_Sel_-_2011.JPG|Refuse collection truck File:CN_railroad_maintenance_truck_171808_20120930_01.JPG|Railroad maintenance truck == Aftermarket ==