首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. At unmanaged junctions, a pattern
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. At unmanaged junctions, a pattern
admin
2013-09-24
50
问题
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. At unmanaged junctions, a pattern of stop-go movement can still be frustrating and burn more fuel than a smooth passage would. Creating such a smooth passage means adjusting a vehicle’s speed so that it always arrives at the lights when they are green. That is theoretically possible, but practically hard. Roadside signs wired to traffic lights may help, but they have not been widely deployed. Now scientists have an idea that could make the process cheaper and more effective. Instead of a hardwired network of signs, they propose to use mobile-phone apps.
For a driver to benefit, he must load a special software, dubbed SignalGuru, into his phone and then mount it on a special bracket attached to the inside of his car’s windscreen, with the camera lens pointing forwards. SignalGuru is designed to detect traffic lights and track their status as red, amber or green. It broadcasts this information to other phones in the area that are fitted with the same software, and—if there are enough of them—the phones thus each know the status of most of the lights around town. Using this information, SignalGuru is able to calculate the traffic-light schedule for the region and suggest the speed at which a driver should travel in order to avoid running into red lights.
Tests in Cambridge, Massachusetts, where five drivers were asked to follow the same route for three hours, and in Singapore, where eight drivers were asked to follow one of two routes for 30 minutes, revealed that SignalGuru was capable of predicting traffic-light activity with an accuracy of 98. 2% and 96. 3% respectively, in the two cities. This was particularly impressive because in Cambridge the lights shifted, roughly half-way through the test, from their off-peak schedule to their afternoon-traffic schedule, while in Singapore lights are adaptive, using detectors embedded(嵌入)under the road to determine how much traffic is around and thus when a signal should change. Fuel consumption fell, too—by about 20%. SignalGuru thus reduces both frustration and fuel use, and makes commuting a slightly less horrible experience.
What did tests in Cambridge and Singapore reveal?
选项
A、SignalGuru can detect the status of traffic lights with accuracy.
B、Traffic lights in Cambridge work better than those in Singapore.
C、Drivers in Singapore follow traffic rules better than those in Cambridge.
D、Traffic lights in Cambridge are more adaptive in off-peak hour.
答案
A
解析
细节辨认题。根据定位句可知,在马萨诸塞州的剑桥市和新加坡分别进行的实验结果表明SignalGuru能够预测交通灯的工作情况,其准确率在两个城市分别为98.2%和96.3%。故答案为A)“SignalGuru能够准确地探测交通灯的状况”。
转载请注明原文地址:https://kaotiyun.com/show/KLc7777K
0
大学英语四级
相关试题推荐
DevelopingElectricCars1.电动汽车的开发受到政府重视2.分析其原因3.提出建议
Formostofus,thepurposeoftheholidaysistobringpeace,love,andgoodwilltowardsall.Yet,formany,theholidayseason
Formostofus,thepurposeoftheholidaysistobringpeace,love,andgoodwilltowardsall.Yet,formany,theholidayseason
A、Itisratherexpensive.B、Itcannotprovideenoughhotwater.C、Itcannotbeusedforheatingthelivingroom.D、Itproducesa
A、Withthelifestylebecomingfast,peopledon’tcareaboutgoodfood.B、Peopleinthesamefamilyhavealmostthesameeatingh
A、Thepolicewanttotalktothemainactor.B、Themainactorforgottocome.C、Themainactorisdelayedbytraffic.D、Theacto
Withtheriseinpopulation,thetrafficincities________________________(日益拥挤).
Educatinggirlsquitepossiblyyieldsahigherrateofreturnthananyotherinvestmentavailableinthedevelopingworld.Women
Accordingtotheauthor,themasonwhytheJapaneseisinfectedgreatlybyEnglishis_____.Whichconclusioncanbedrawnbase
随机试题
A.奥本海姆征B.挛缩C.痉挛D.阵挛E.戈登征用手挤压患者腓肠肌,是检查【】
中毒型细菌性痢疾脑型的表现特点是()(1988年)
消渴的基本病机主要是
出让合同约定的动工开发期限满1年未动工开发的,可以征收相当于土地使用权出让金()以下的土地闲置费。
对于业主和整个设备工程项目来说,各参与方是业主的合作者,参与完成项目的一部分任务,其中()通常帮助业主完成设备工程项目的管理任务,其他参与方帮助业主完成建设任务。
纳税人销售不动产,应当向其机构所在地主管税务机关申报缴纳营业税。()
下列事项中符合《行政许可法》规定的有()。
图示为自来水管道示意图,水从源头流向蓄水池,管道中有甲乙丙丁4个阀门和1个水位表,若水位表测得其所在位置并没有水流过,那么阀门没开的可能性共有几种?()
Probablyforaslongastherehavebeensalesforces,managershavesoughtwaystodeterminewhethertheyareeffectiveornot.
Forthispart,youareallowed30minutestowriteanessaybasedonthepicturebelow.Youshouldstartyouressaywithabrief
最新回复
(
0
)