The traffic in the city is chaotic in the rush hour.

在上下班高峰时间，城市的交通混乱不堪。

《牛津词典》

Traffic jam is common in the rush hour.

高峰期经常会出现交通堵塞。

youdao

You could imagine how crowded it is in the rush hour.

你可以想像得到在上班高峰期有多拥挤。

youdao

The American Heart Association recommends reducing time spent in heavy traffic or jogging during rush hour, or near busy roadways and better treatment for cardiovascular risk factors.

VOA: standard.2010.08.04

Roads surrounding the Metropark Hotel in Wanchai district were closed Friday in the middle of the evening rush hour as the government vehicles prepared to transport nearly 300 people from the hotel.

VOA: standard.2009.05.08

Paul Givan of the DUP asked about traffic congestion on the A1 road at Hillsborough roundabout in the rush hour.

BBC: Question Time

Even so, as a two-wheeler you feel very vulnerable when cars are only a matter of inches away in the rush hour.

BBC: Is cycling a realistic alternative to taking the car?

The Guardian describes the accident as a "fireball in the rush hour", while the headline in the Daily Star calls it a "flaming miracle" more people were not killed as "hundreds cheated death".

BBC: Papers