I drive a 793 Caterpillar Mine truck in a steel mine. The company is US Steel, and we are just a small part of the huge company.
Tires are 12' tall, seat in cab is around 14-15' off the ground, empty weight is 240 ton. Haul 240-270 tons of rock every load. Fully loaded truck weight is 850,000 lbs.
We work 12 hour shifts (nite and day shifts), 14 days a month. Drive around 140 miles a shift.
here's a vid for perspective. (no I'm not driving lol)