求大牛指导本题逻辑细节，跪谢

林雪然

According to the Tristate Transportation Authority, making certain improvements to the main commuter rail line would increase ridership dramatically. The authority plans to finance these improvements over the course of five years by raising automobile tolls on the two highway bridges along the route the rail line serves. Although the proposed improvements are indeed needed, the authority's plan for securing the necessary funds should be rejected because it would unfairly force drivers to absorb the entire cost of something from which they receive no benefit.

Which of the following, if true, would cast the most doubt on the effectiveness of the authority's plan to finance the proposed improvements by increasing bridge tolls?

A.Before the authority increases tolls on any of the area bridges, it is required by law to hold public hearings at which objections to the proposed increase can be raised.

B.Whenever bridge tolls are increased, the authority must pay a private contractor to adjust the automated toll-collecting machines.
C.Between the time a proposed toll increase is announced and the time the increase is actually put into effect, many commuters buy more tokens than usual to postpone the effects of the increase.
D.When tolls were last increased on the two bridges in question, almost 20 percent of the regular commuter traffic switched to a slightly longer alternative route that has since been improved.
E.The chairman of the authority is a member of the Tristate Automobile Club, which has registered strong opposition to the proposed toll increase.One objection to this plan is that drivers will have to pay for something from which they will not benefit.

这道题的答案是D，在最后说了一句switched to a slightly longer alternative route that has since been improved.这个improved是什么意思，这条路是不收钱么？

riverwind91

D项说，上一次提高过路费时，桥上的交通流量减少了20%，这20%绕路了。因此可以预计，这次再提价，会有更多人选择不走这桥，从而导致authority通过提价而筹钱的阴谋失败，反而还可能收入更少。
improved意思应该是路况有所改善，至于受不收费不重要，就算收费，我们也可以推断收得比桥要少，要么那20%的绕路的是二百五吗？

说白了就是该authority没有明白自由经济的含义。还是天朝好，比如油价，我就涨价，你们有本事烧汽车柴禾啊！人家authority想涨价盘算得还是改善路况，我朝汽油涨价多收的钱都喂狗了

林雪然

谢谢，明白了，只有人流量减少这道题就削弱了