一般整个美国的州际高速公路上车速限制为55-65英里，城市里的车速限制是每小时25-30英里。
The speed limit in cities is usually set between 25 and 30 miles per hour.
根据计算结果，提出了高速公路对应不同路面状况的最高车速限制取值的建议。
Suggestions about maximum speed limits on freeways under different pavement conditions were presented based on the correlation.
美国有成千上万英里的免费高速公路。快速干道和收费高速公路。因为车速限制在每小时55英里，所以快速行车是不可能的，除非驾车者准备冒支付一大笔罚金的风险。
There are thousands of miles of freeways, expressways and turnpikes, yet rapid journeys are not possible unless the driver is prepared to risk a heavy fine, for there is a speed limit of 55 MPH.
美国有成千上万英里的免费高速公路。快速干道和收费高速公路。因为车速限制在每小时55英里，所以快速行车是不可能的，除非驾车者准备冒支付一大笔罚金的风险。
There are thousands of miles of freeways, expressways and turnpikes, yet rapid journeys are not possible unless the driver is prepared to risk a heavy fine, for there is a speed limit of 55 MPH.
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