出典:Wikipedia
出典:『Wikipedia』 (2009/12/30 10:49 UTC 版)
For safety reasons, railway lines are assessed and a speed limit imposed on trains running on that line. Many factors can affect the speed limit of a particular line including the state of the track, the curvature of the track, the number of stations, the individual features of stations or junctions and the stopping distances of trains running on that track are examples of such factors.