英和和英

語源

dummy +‎ light

名詞

dummy light (複数形 dummy lights)

1. (slang) Synonym of idiot light (“warning light”)
2. (slang) A type of stop light (traffic light) set in the middle of the intersection, and not at the sides, corners or above (thus forming a crash hazard). These lights are placed similarly to how traffic police platforms are set dead center of intersections.

Further reading

(stop light):

• dummy light on Wikipedia.
• dummy lights on Wikimedia Commons.