Yard goats, known by various names such as terminal tractors and spotter trucks, are crucial for moving trailers in confined spaces like warehouses and cargo yards. Unlike traditional semi-trucks, yard goats have a compact design with a small, offset cab and large windows, enhancing visibility and maneuverability. A standout feature is the hydraulic fifth-wheel lifting boom, which allows drivers to connect trailers without the manual cranking typically required, significantly reducing the risk of injury. The first dedicated terminal tractor was introduced in 1958 by Ottawa Steel Products, and since then, technology has advanced with innovations like automatic coupling systems that streamline the connection process. Today, yard goats are evolving further with all-electric models and autonomous versions, enhancing their efficiency in cargo operations. For instance, Kalmar Ottawa's T2 EV is designed for use near charging stations, while companies like Fernride are testing self-driving models in Europe. These advancements enable yard goats to move trailers three to ten times faster than conventional semis, marking them as vital assets in modern logistics.