To ease traffic congestion,Clark says, Houston transportation officials created special safety programs to reduce the number of accidents, which tie up traffic.

VOA: standard.2010.07.26

because if you take it during the day, there'll be a lot of traffic and congestion.

因为如果你白天坐，道路会拥堵。

伦敦的夜生活 - SpeakingMax英语口语达人

"It's estimated that the average commuter in our region, congestion costs that person in excess of $1000 per year in lost time."

VOA: standard.2010.07.26

"I'm pleased that we're making some progress towards mitigating the levels of traffic congestion in our region."

VOA: standard.2010.07.26

"One example of what they have done is what they call a Congestion Management Program where everybody driving into central city pays a congestion fee and the idea there is to discourage people from driving, but take public transportation instead."

VOA: standard.2010.07.26