首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Passage 1 Traffic lights are crucial tools for regulating traffic flow. The...
Passage 1 Traffic lights are crucial tools for regulating traffic flow. The...
admin
2020-12-24
38
问题
Passage 1
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 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
主旨题。通读全文可知,这篇文章主要讲诉SignalGuru这款手机应用软件的作用,为司机提供很大帮助。故选B。
转载请注明原文地址:https://ti.zuoweng.com/ti/WDT8KKKQ
相关试题推荐
Passage2 Americanstodaydon′tplaceaveryhighvalueonintellect.Ourhe...
Passage2 Americanstodaydon′tplaceaveryhighvalueonintellect.Ourhe...
Passage2 Americansdon’tliketolosewars.Ofcourse,alotdependsonhowy...
Passage2 Americansdon’tliketolosewars.Ofcourse,alotdependsonhowy...
Passage2 Ofallthecomponentsofagoodnight′ssleep,dreamsseemtobe...
Passage2 Ofallthecomponentsofagoodnight′ssleep,dreamsseemtobe...
Passage2 Ofallthecomponentsofagoodnight′ssleep,dreamsseemtobe...
Passage2 ForcenturiesinSpainandLatinAmerica,headinghomeforluncha...
Passage2 ForcenturiesinSpainandLatinAmerica,headinghomeforluncha...
Passage2 ForcenturiesinSpainandLatinAmerica,headinghomeforluncha...
随机试题
2型糖尿病的主要发病机制是( )。 A、胰岛素抵抗 B、胰高血糖素分泌升高
患者,右下第一磨牙缺失,行双端固定桥修复。固定桥试戴时,就位后固定桥以桥体处为支
按相关规范规定,建筑水泥的存放期通常为()个月。 A、1B、2C、3D
观感质量验收时评价为差的检查点,应通过()等补救。
口腔诊疗中所用到的各种内镜、导管需用的清洗方法为
女性,48岁。排便带血3个月,排便有下坠感,里急后重。直肠镜检查距肛缘10cm
道路工程施工中压实黏性土壤路基时,可选用的压实机械有()。A.平地机B.光轮压路机C.轮胎压路机D.夯实机械E.沥青混凝土摊铺机
我国小学德育的方法主要有()。 A.说服法B.榜样法C.锻炼法D.陶冶法E.实验法
()具有风险低、流动性好的特点。A.股票基金B.债券基金C.货币市场基金D.混合型基金
某企业决定以职位为导向重新设计基本薪酬制度,其可采用的方法有()A.职位等级法B.职位分类法C.关键绩效指标法D.因