passenger rail (commuter, regional, intercity and high-speed) other than large-capacity metro. At-grade urban rail transit Tram, streetcar, trolley The terms tram, streetcar, and trolley refer to most forms of common carrier rail transit that run entirely or partly on streets, providing a local service and picking up and discharging passengers at any street corner, unless otherwise marked. While tram or tramway are widely used worldwide, the term used varies in different dialects of English, with streetcar and trolley most commonly used in North America (streetcar being more common in the western and central part of the continent and trolley in the eastern part), while tram predominates in Europe and elsewhere. Tram is a British word, cognate with the Low German , and the Dutch , meaning the "shafts of a wheelbarrow". From this the term "tram" was used in the coal mines of Scotland and Northern England for a coal cart running on rails, and by extension to any similar system of trackway. Streetcar is an American word derived from "street" + "car", where "car" is used in the sense of a vehicle running on rails, i.e. railway car. The first American streetcars, introduced around 1830, were horsecars, and this type of streetcar became ubiquitous because very few of the streets in American cities were paved. Mechanical versions, pulled by cables, were introduced around 1870. Electric streetcars were introduced in the 1880s and soon replaced the horse-drawn streetcar in cities across the United States. Trolley is an American word derived from the electric current pickup mechanism in early systems. The first successful electric streetcars in the United States used a system devised by Frank J. Sprague, in which a spring-loaded trolley pole pushed a small trolley wheel up against an overhead wire to collect electricity for the motors. Although not the first overhead collection system, it was far more reliable than its predecessors, and eventually became used by almost all streetcars. Some authorities believe that the vehicle became known as a trolley car because it reminded people (particularly on the West Coast) of a boat trolling for fish. Others believe it derived from a dialect word for a wheeled cart. In the U.S. the word tram frequently refers to a special-purpose bus used as a shuttle (and often not designed for use on public roads), such as for parking lot shuttles at theme parks and major events or transportation within