sometimes congested
有时拥挤
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Drivers could be rewarded for taking the roads less traveled-not having to pay, and sometimes even getting paid, if they chose to commute on less congested routes on particularly busy days.
如果司机们选择人少的路线行车，或者选择不太拥堵的路线上下班，就可以获得奖励。
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