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
职业资格
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. Drivers exchange the gridlock that
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. Drivers exchange the gridlock that
admin
2018-03-02
43
问题
Traffic lights are crucial tools for regulating traffic flow. They are not, however, perfect. Drivers exchange the gridlock that would happen at unmanaged junctions for a pattern of stop-go movement that can still be frustrating, and which burns 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 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
细节题。文中第三段第一句指出“Tests in Cambridge,Massachusetts…revealed that SignalGuru was capable of predicting traffic-light activity with an accuracy of 98.2%and 96.3%respectively.”,即SignalGuru能够准确探测交通灯的状况。故选A。
转载请注明原文地址:https://kaotiyun.com/show/lX3v777K
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
Ithasbeensuggestedthatallgovernmentofficials______informationontheirincome.
Whichofthefollowingactivitiescanbeusedtogetthemainideaofapassage?
______arenotaminimalpairinEnglish.
Whichisthemostadvantageousrelationshipmodebetweenteachersandstudentsforthedevelopmentofstudents?
Teacher:Afterlistening,answerthefollowingtwoquestionsaccordingtowhatyouhaveheardonthetape.(1)Whatistherelati
Morphemesthatrepresent"tense","number","gender","case"andsofortharecalled______morphemes.
Thedyedbunscandal(染色馒头丑闻)dealsanotherblowtoshoppers’confidenceinbuyingfoodproducts,aswellasthereputationofloc
Whichvowelisdifferentfromtheothersaccordingtothecharacteristicsofvowels?
WhyhascrimeintheU.S.declinedsodramaticallysincethe1990s?Economistsandsociologistshaveofferedabountyofrea
Themorpheme"-ee-"intheword"geese"isa______.
随机试题
胸部高分辨力CT扫描的适应证,不包括
下列不是卵巢恶性肿瘤高危人群的是
朊病毒的化学本质是
A.相须B.相使C.相畏D.相杀E.相恶黄芪配茯苓体现的是七情中的
患者,男,高处坠落后出现严重呼吸困难、四肢不能活动。查体:颈部压痛,四肢瘫痪,高热,有较重痰呜音。x线摄片提示:C4~C5骨折,合并脱位。减轻脊髓水肿和继发性损伤可采取
某行政单位购建一幢办公楼,工程项目支出为100万元,该资金的支付可以采用财政授权支付程序。()
大城市的公共交通部门正在赤字中挣扎。乘客总抱怨汽车晚点、运输工具出毛病、服务种类减少以及票价高于他们过去习惯于支付的水平。由于上述所有原因以及汽油的价格并未高至令人不敢问津的水平,所以公共交通的乘客有所减少,更进一步增加了赤字。下面哪一项关于公交乘客数量与
邓小平指出:“改革是中国的第二次革命”,这一论断的含义是指
如果I/O所花费的时间比CPU处理时间短得多,则缓冲区( )Ⅰ.最有效Ⅱ.几乎无效Ⅲ.均衡
PhyllisWheatleyisregardedasAmerica’sfirstblackpoet.ShewasborninSenegal,Africa,about1753andbroughttoAmericaa
最新回复
(
0
)