政策制定者还应该讨论自动驾驶汽车如何帮助减少交通堵塞、减少排放，并提供更方便的出行选择。
Policymakers also should be talking about how self-driving vehicles can help reduce traffic jams, cut emissions and offer more convenient mobility options.
每户人家限定只能拥有一辆汽车来减少交通负荷，因而很多商人只好坐着摩托去出行。
Households are limited to owning one car to cut down on traffic, so affluent businessmen can be seen zipping to work on motorscooters.
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