孭仔燈 [－－灯]

Jyutping me1 zai2 dang1
Pinyin miē zǎi dēng

Definitions (粵典–words.hk)
  1. 名詞、俚語
    附​設​喺​交通​燈​上面​綠燈​隔​籬​嘅​箭​嘴​燈​號​，​即​係​轉向​交通​燈​；​箭​嘴分​為​向​左同​向​右​，​指示​司​機​喺​綠​燈​着​咗​之​後​相​應​嘅​轉​彎​方向​（​量​詞​：​盞​）
    "green arrow signs" (also known as Traffic Lights with Split Phase)