A construction worker is someone whose job is to work on a construction site where structures such as bridges or houses are being built. Construction workers use many types of tools (such as shovels and wrenches) and operate machines and vehicles such as trucks and bulldozers. Working as a construction worker can be dangerous, because a person could fall, or have a heavy object fall on them. Construction workers have to wear safety clothing to protect themselves, such as leather work boots with a metal toe, plastic construction hats or helmets, and goggles to protect their eyes. Many construction workers also wear brightly-coloured orange safety vests, so that drivers and other construction workers will be able to see them.