西 [---]

Jyutping sai1 bak1 tit3 lou6
Pinyin xī běi tiě lù

Definitions (Wiktionary)
  1. name, Hong-Kong, formal
    the North-west Railway; the light rail system operating within Tuen Mun and Yuen Long Districts by the MTR.
    (syn.) 輕鐵