A bulldozer is a tracked machine with a blade for pushing earth and debris. It is one of the most recognizable pieces of heavy equipment. The blade is mounted on the front, and the machine pushes material forward. It can clear vegetation, level ground, and move piles of soil. It is slow but powerful. The tracks distribute the machine's weight, giving it traction on soft ground. The bulldozer is the workhorse of site preparation.

Bulldozers come in several sizes. A small utility dozer, like a Komatsu D31, can work in tight spaces. A large crawler dozer, like a Caterpillar D11, weighs over 100 tons and can push enormous loads. The blade can be straight, angled, or a universal blade with curved wings. Some bulldozers have rippers on the back to break up hard soil or rock. The machine is operated by a joystick or levers, and the operator sits in a cab with a rollover protection structure.

Bulldozers are used in many applications. They clear land for construction. They build roads and dams. They push scrapers and assist with grading. They move debris after disasters. They are also used in mining and landfills. The bulldozer is not a precision tool. It is a brute-force machine. But without it, many construction projects would be impossible. It moves the earth that everything else is built on.