Why does a bulldozer move faster when it goes backwards?
A bulldozer's main job is to push soil. When it moves forward pushing soil, it has to move slower making sure it is giving a solid push. It moves faster when it moves backwards, so it can go back to the pushing position quickly to increase efficiency.
Pushing hard and getting back to the position quickly, a bulldozer keeps working smoothly. Things like this make a construction machine more functional.