light railway
noun /ˌlaɪt ˈreɪlweɪ/
  /ˌlaɪt ˈreɪlweɪ/
(also light rail especially in North American English)
- a track made for less heavy trains to run on轻轨:为较轻的火车行驶的轨道 - Rio built bus express lanes and a light railway to improve transport around the city.里约修建了公共汽车快速车道和轻轨,以改善城市交通。 
 
- Rio built bus express lanes and a light railway to improve transport around the city.