内容正文:
主 题:如果你在城市里开车,那你肯定会经历在一个又一个街区绕圈找停车位的挫折。但研究这种现象的科学家找到了腾出更多车位的方法:提高停车费,这样人们就不得不决定是少花点钱停远点,还是多花钱停近些。
出 处:Scientific American
体 裁:说明文
字 数:324字
用 途:课文阅读补充材料
适用对象:高三学生(词汇量3500)
【新闻正文】
If you drive in a city, you've no doubt experienced the frustration of circling block after block, cruising for parking. But scientists who study that phenomenon have a solution to free up more spots:
“You make them more expensive, so people have to decide whether to park farther away and pay less, or closer and pay more”, Itzhak Benenson, a system scientist at Tel Aviv University.
San Francisco has piloted a program like that that raises parking rates based on demand—and it's been shown to reduce cruising. But the sensors required for those systems can cost millions of dollars to install and operate, Benenson says. So instead, writing in IEEE Intelligent Transportation Systems Magazine, he and his colleague Nir Fulman describe an algorithm(算法) that can determine smart pricing, without the use of sensors.
They tested it on the Israeli city of Bat Yam, near Tel Aviv. First, they divide the city into zones. They estimate the parking demand in each zone, by calculating the number of apartments and offices there. And then they factor in parking supply in the area, along with how wealthy potential parkers might be. With that data, the algorithm suggested pricing for each zone that would guarantee a 90-percent occupancy rate of parking spots city-wide. Meaning 10 percent of spots were always available to drivers willing to pay the price, regardless of neighborhood.
Of course, not everyone will agree that jacking up parking prices will ease driver frustrations. Last time Benenson proposed hiking rates for city residents? "I got about 100 reactions on the web and 99 of them that said they have never heard such a stupid statement from the professors, and I should be punished and fired."
Ultimately, he says, it'll be up to cities themselves to gauge their residents' political appetites f