首页
登录
职称英语
Traffic lights are crucial tools for regulating traffic flow. They are not,
Traffic lights are crucial tools for regulating traffic flow. They are not,
游客
2024-02-09
23
管理
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. [br] Roadside signs have not been widely deployed probably because______.
选项
A、they are less effective in bad weather
B、they cost more money to install
C、it is hard to wire them to traffic lights
D、it takes a lot of space to put them up
答案
B
解析
推理判断题。定位句明确指出,路旁信号装置没有得到广泛使用,但是没有直接阐述原因,而是在下一句中通过描述科学家的一个办法暗示出来:现在,科学家们想出一个更便宜、更有效的办法。由此推断,路旁信号装置之所以没有得到广泛应用可能是由于费用过高、效果不理想,故B)“安装它们需要花费更多的钱”符合文意。
转载请注明原文地址:https://tihaiku.com/zcyy/3434827.html
相关试题推荐
Trafficfacilitiesshouldbeimprovedasquicklyaspossible______.(以减少交通事故的数量)
Look,apolicecariscoming.There______(前面肯定是出交通事故了).mustbesometrafficacc
Outofarandomsampleofdrivers,21%______(在前一年中出过交通事故).hadbeenintrafficac
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Bynow,everyoneknowsyousaveenergybyturningoutlights.Andyou【S1】___
Bynow,everyoneknowsyousaveenergybyturningoutlights.Andyou【S1】___
Bynow,everyoneknowsyousaveenergybyturningoutlights.Andyou【S1】___
Bynow,everyoneknowsyousaveenergybyturningoutlights.Andyou【S1】___
Bynow,everyoneknowsyousaveenergybyturningoutlights.Andyou【S1】___
随机试题
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopeda
Helloandwelcometothisweek’seditionofTellMeMore—theprogramwhere
[originaltext]W:IthoughtIwasspeakingEnglishfairlywell,butpeoplekeep
2型非肥胖型糖尿病,β细胞储备功能良好,无胰岛素血症应首选()。A:胰岛素
共用题干 第三篇SleeplessatNightItwasanorm
()是课程目标的进一步具体化。 A.教育目的B.培养目标 C.课程计划
荀子将学习过程视为“闻一见一知一行”,其中他特别强调()的重要性。 A.闻
(2015年真题)企业生产调度的依据是()。A.销售计划 B.生产进度计
根据《中华人民共和国放射性污染防治法》,开发利用或者关闭铀(钍)矿的单位,需编制
()反映建设项目建成后新增固定资产、流动资产、无形资产和其他资产价值的情况
最新回复
(
0
)