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
2012-12-13
71
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/zvw7777K
0
大学英语四级
相关试题推荐
Itwasamatterofcourseforyoutodressupcarefullywhenyou______yourgirlfriend.
Thetownwassurroundedbythefloodbutthepeople______untilhelpcame.
Moresurprising,perhaps,thanthecurrentdifficultiesoftraditionalmarriageisthefactthatmarriageitselfisaliveand【C1
A、They’vemetbefore.B、Hedoesnotrememberthewoman.C、Thewomanshouldagreewithhim.D、Theyhavenevermetbefore.A对话中男士提
A、ProfessorHarrisondoesn’tteachwell.B、Thewomandoesn’thavetoborrownotesfromJim.C、Jim’snotesaregoodforthewoman
A、Paulshouldtakeoverhisuncle’sbusinessnow.B、Hedoesn’tagreewiththewoman’sremarks.C、Paulshouldstayanotheryearf
A、Tocreatestabilityintheirlives.B、Toembracechangesofthought.C、Toadapttothedisintegratedfamilylife.D、Toreturn
Averyimportantworldproblemistheincreasingnumberofpeoplewhoactuallyinhabitthisplanet.Thelimitedamountoflanda
ThismaycomeasnosurprisetoresidentsofNewYorkCityandotherbigurbancenters:Livingtherecanbebadforyourmental
A、He’sfondofItalianfood.B、He’snotmadaboutItalianfood.C、Hedoesn’tagreewiththewoman.D、Hedoesn’tthinkItalianfo
随机试题
在公共政策执行力影响因素中发挥核心作用的因素是
女,30岁,因加夜班后次日咽痛、鼻塞,伴低热,查体发现咽部红肿,咽后壁、扁桃体淋巴滤泡增殖,下颌淋巴结肿大,血白细胞4.5×109/L。最可能出现的并发症是
关于《中华人民共和国环境保护法》,下列说法错误的是()。
甲公司有三个事业部,分别从事A、B、C三类家电产品的生产和销售,这些产品的有关市场数据如表1和图1。在A、B、C三类产品市场上,甲公司的最大竞争对手分别乙公司、丙公司和丁公司。问题:1.A、B、C三类产品目前分别处在产品生命周期的哪个阶段?该产
虚拟局域网与传统局域网的主要区别表现在组网方面。()
材料一:正如在社会中,每个人的能力总是最容易在动荡的情况下而不是在其他情况下发挥出来,所以同样隐蔽在自然中的事情只是在技术的挑衅下,而不是在任其自行游荡下,才会暴露出来。(引自培根《新工具》)我们有三种主要的方法:对自然的观察、
[*]
Readthetextbelowaboutinformationtechnology(IT)training.Inmostofthelines(34-45),thereisoneextraword.Itisei
Thenewpolicymayhaveprotectedthenewcityfrombeingpollutedaswellasthelifeofitsresidents______.
A、Shehasacomputerrelatedmajor.B、Shecanmendcomputers.C、Sheisgoodatlanguage.D、Sheisacollegestudentnow.A
最新回复
(
0
)