Imagine you enter a car with no steering wheel, no brake or accelerator pedals (踏板). Under a voice-activated command, you say an address. “The fastest route will take us 15.3 minutes. Should I take it?” You say “yes” and are on your way. The car responds and starts moving all by itself. All you have to do is sit back and relax.

    How weird would it be if, one day in the future, everyone had such a car? No crazy driving, no insults, no cutting in, traffic laws would be respected and driving much safer. On the other hand, imagine the cost savings for local police enforcement and town budgets without all those speeding and parking tickets.

    A new technology has the potential to change modern society in radical ways. There’s no question that self-driving vehicles could be an enormous benefit. The potential for safer cars means accident statistics would drop: some 94% of road accidents in the U.S. involve human error. Older drivers and visually- or physically-impaired people would gain a new level of freedom. Maintaining safe speeds and being electric, self-driving cars would drastically reduce pollution levels and dependency on non-renewable fuels. Roads would be quieter, people safer.

    But we must also consider the impact of the new technology on those who now depend on driving for their livelihoods. According to the U.S. Department of Labor, in May 2015 there were 505,560 registered school bus drivers. The American Trucking Associations lists approximately 3.5 million professional truck drivers in the U.S.

    The companies developing self-driving vehicles should be partnering with state and federal authorities to offer retraining for this massive workforce, many of whom will be displaced by the new technology. This is similar to what’s happening in the coal and oil industries, a situation that fuels much of the current political discontent in this country.

    New technologies will, and should, be developed. This is how society moves forward. However, progress can’t be one-sided. It is necessary for the companies and state agencies involved to consider the ethical consequences of these potential changes to build a better future for all.

解析：B。根据the extensive use of driverless car可定位至原文第二段。该段最后一句提到，如果每个人都拥有一辆无人驾驶汽车的话，没有超速和停车罚单，当地警察执法和城镇预算可以节省多少成本。言下之意是，无人驾驶汽车的应用可以为政府节省预算，故B选项为正确答案。原文提到的“没有疯狂驾驶，没有辱骂，没有插队”等是无人驾驶汽车的影响，而不是人以文明的方式驾车，因为无人驾驶汽车是不需要人驾驶的，故A选项错误。第二段最后一句指出无人驾驶汽车可以节约警察的成本，也就是巡逻的警察会更少，所以C选项错误。原文第二段第二句指出交通规则会得到遵守，可见交通规则还是存在的，故D选项错误。