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
30
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 do drivers do if they want to pass unmanaged junctions smoothly?
选项
A、They must wait patiently until traffic lights turn green.
B、They need to help traffic police to regulate traffic flow.
C、They can drive through the red lights if nobody is around.
D、They have to adjust the speed in time for the green lights.
答案
D
解析
事实细节题。根据定位句可知,在管理不善的交叉路口,驾驶过程让人懊恼,还会耗油,要想实现顺畅的行驶,就意味着要调节车速,让车辆在到达交通灯时总遇到绿灯便可。故正确答案为D)“他们必须调节速度以及时赶上绿灯”。
转载请注明原文地址:https://jikaoti.com/ti/ZyQFFFFM
0
大学英语四级
相关试题推荐
Formostofus,thepurposeoftheholidaysistobringpeace,love,andgoodwilltowardsall.Yet,formany,theholidayseason
A、Invitingforeignstudentstodinner.B、Eatinghabitsofforeignstudents.C、Sharingaflatwithforeignstudents.D、Gettingal
A、Withthelifestylebecomingfast,peopledon’tcareaboutgoodfood.B、Peopleinthesamefamilyhavealmostthesameeatingh
A、English.B、Japanese.C、Spanish.D、Greek.BWhichofthefollowinglanguagesisnotamemberoftheIndo-Europeonlanguagefamil
Educatinggirlsquitepossiblyyieldsahigherrateofreturnthananyotherinvestmentavailableinthedevelopingworld.Women
Educatinggirlsquitepossiblyyieldsahigherrateofreturnthananyotherinvestmentavailableinthedevelopingworld.Women
Infuturetradethekeydevelopmenttowatchistherelationshipbetweentheindustrializedandthedevelopingnations.TheThir
A、EditingSundaySport.B、WorkingforCapitalRadio.C、Managingprofessionalsoccerteams.D、Developingasportsmarketingcompa
随机试题
1994年全面推行分税制后,__________属于中央与地方共享税。
下列关于突发事件的恢复工作的说法错误的是()。
仲裁过程中,被申请人经书面通知,无正当理由不到庭的,应( )。
付款人累计()次提出无理拒付的,付款人开户银行应暂停其向外办理托收。
下列金融资产中,应按公允价值进行初始计量,且交易费用不计入初始入账价值的是()。
17世纪捷克教育家夸美纽斯在()中对班级授课制给予了系统的理论描述。
从洋务运动到五四运动前后,近代化在中国曲折发展。在中国近代化的发展历程中,下列口号或主张出现的先后顺序是()。①自强、求富②民主、科学③三民主义④变法维新
A.briefB.entriesC.intoA.beclassified【T1】______fourtypesB.【T2】______formofweblogC.【T3】______onablogareorgan
设机器字长为8个二进制位,对于十进制数一128,其补码表示为________________。
文件IN.DAT中存有200个四位整型数,函数ReadData()负责将IN.DAT中的数滨到数组inBuf[]中。请编写函数findValue(),其功能是:求出满足千位数上的值减百位数上的值减十位数上的值减个位数上的值大于零且此四位数是奇数的数.并按照
最新回复
(
0
)