straight as start and finish line for pursuit races. A white 200 m line marks before the finish. Track construction Velodromes may be indoors or outdoors. In the heyday of velodrome racing (1890–1920), indoor tracks were common. When hosting six-day races, they were popular for revellers and urban sophisticates to congregate in the early hours after the bars had closed. Indoor tracks are not affected by weather and are more comfortable for spectators. They ride smoother and last longer. Despite the advantages of indoor tracks, outdoor velodromes are more common, as an outdoor venue does not require a building, making it more affordable, especially when new. Today, although many classic indoor tracks have been torn out of buildings and replaced by venues for more popular sports, velodromes are still sometimes built into indoor venues, particularly where track racing can generate enough revenue to cover the expense of dedicating a building to it. Race formats There are a variety of formats in velodrome races. A typical event will consist of several races of varying distances and structures. Common types of races include: Scratch race is the most straightforward type of race where riders compete over a specified distance and the order of finish determines the winners. Points race assigns value to specific laps throughout a race, e.g. every tenth lap. Generally the leading rider and sometimes the second place rider will be awarded points. The structure and timing of points races varies greatly, but the winner is determined by the accumulation of points and not necessarily the rider crossing the line first at the end of the race. Standard points races can have sprints every ten laps with the first three or four riders scoring, while Tempo races award a single point to the sprint winner, but award a point every lap, sharing the attritional quality of the Elimination race. Elimination race, also known as the Devil, from the phrase "devil take the hindmost", or "miss and out", removes the last place rider from each lap (every second lap on shorter tracks) until only a few riders, often the final two, remain. The final standings are then determined by a rolling start match sprint over the last two laps. Madison races team up pairs of riders in a tag-team format. Riders "sling" their teammate forward to facilitate alternating sprints that keep the pace very high during typically long races (, or