noun, noun or participle which takes 'suru', intransitive verb
waiting for a traffic light; waiting at a red light
Refers to the act of waiting for a traffic signal to change, typically while driving or cycling. Can be used as a noun or with する to mean 'to wait for the light'.
交差点で信号待ちをしている。
I'm waiting for the traffic light at the intersection.
信号待ちの間にスマホを見
You mustn't look at your smartphone while waiting at a red light.