雖然許多街道電車系統曾經在世界上許多國家被廣泛使用，不過自1930年代以後 即快速地沒落，甚至消失不見，在 1960 至 1970 年間，在某些國家以提昇電車的系統技術 、導入革命性的觀念，促使輕軌運輸系統的復興。本篇論文即在提供一廣泛性對於輕軌運輸 系統技術發展現況的介紹，而這些發展在擴展系統容量及擴大市場上扮演著最主要的角色。

　　　　　Although many tramway systems were once widespread in most parts of the world, from the 1930's onwards they declined quite quickly and in many places, disappeared altogether. In some countries, systems were upgraded inthe 1960' s & 70's using new technologies and ideas and have thereby e-volved gradually into systems. The objective of this paper is to provide ageneral introduction of the current developments in LRT system technology. These developments have played a major role in expending the capacity of and the market for, LRT system.