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
39
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] What does the passage mainly concern?
选项
A、Traffic lights turn out to be not perfect all the time.
B、Phones with SignalGuru can be a great aid to drivers.
C、Drivers are often struck at unmanaged junctions.
D、Cities in the developed countries need SignalGuru badly.
答案
B
解析
主旨大意题。这篇文章主要介绍一款手机应用软件SignalGuru,它能够较为精确地探测交通灯的变化情况,为驾驶员提供参考车速,以及时赶上绿灯,使行车更加顺畅,由此可知B)“装有SignalGuru的手机对于驾驶员有很大的帮助”为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3434830.html
相关试题推荐
WriteacompositionentitledOnlyStricterTrafficLawsCanPreventAccident
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
随机试题
Thiswasbutanadditionaltestimonyofthesuperiorityofthesocialisteconomi
HowtoBeRespectfulofYourParentsChangingyourthou
身体转向活动的正常水平并且阻抗继续增加的阶段是()。A.报警反应阶段 B.应
早期的向导服务向现代导游服务的转变是一种质的变化是因为( )。A.在性质上,向导
A.水分B.溶化性C.均匀度D.外观性状E.崩解时限软胶囊剂需要进行的特殊检查为
正常脑脊液中可见A.红细胞B.嗜酸性粒细胞C.嗜碱性粒细胞D.淋巴细胞E.嗜中性
关于建设工程项目总承包单位工作内容的说法,正确的是( )。 A、按照合同约定
A.鹅口疮 B.红斑型白念 C.托牙口炎 D.念珠菌白斑 E.念珠菌口角
某公司现在采用“n/30”的信用政策,拟将信用条件改为“0.8/30,n/60”
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)