Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A tram accident is generally an accident in which a tram is involved (see a tram in picture 1). When general traffic safety is evaluated, as in traffic accident statistics, any accident involving a tram or a tram system can be considered to be a tram accident. Some statistics concerned with public safety collect information on any incident in a tram or a tram system. Tram traffic is typically considered as environmentally friendly, efficient, comparatively safe and, after investments, is a relatively cheap way to transport passengers in cities. A tram typically travels at a relatively slow speed in cities, however, light rail vehicles may drive at a speed of 70 100 kilometres per hour (approx. 44 - 60 miles per hour).