高峰时段高速公路上交通拥堵严重。

There is heavy traffic ___congestion on the motorways during peak hours.

贝洛奥里藏特的交通拥堵是一个不容忽视的问题。

The traffic ___congestion in Belo Horizonte is an issue that can't be ignored.

市中心的拥堵正给通勤者造成严重延误。

The ___congestion in the city centre is causing significant delays for commuters.