rush hour

This term describes a specific period of peak congestion and is almost always used in the context of urban commuting. It carries a connotation of stress, delay, and inefficiency, often evoking the image of gridlocked traffic or overcrowded public transit.

While the term is primarily associated with road traffic, it is frequently applied to trains, buses, and subway systems. In professional or formal contexts, it may be replaced by "peak period" or "peak travel times," but "rush hour" remains the standard colloquial expression for daily commuting surges.