noun
yellow zone
A loanword from English, used in contexts such as traffic signals, warning areas, or graded risk levels. Not a deeply integrated Japanese word; often used in technical or international settings.
信号がイエローゾーンに入ったら、安全に停止してください。
When the signal enters the yellow zone, please stop safely.
Variant with interpunct; less common but still seen.
Direct loan from English 'yellow zone'.