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
2024-02-06
30
管理
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. [br] Roadside signs have not been widely deployed probably because______.
选项
A、it takes a lot of space to put them up
B、it is hard to wire them to traffic lights
C、they cost more money to install
D、they are less effective in bad weather
答案
C
解析
推断题。短文第一段最后提出Roadside signs wired to traffic lights mayhelp.but they have not been widely deployed.Now scientists have an idea that couldmake the process cheaper and more effective.即路旁信号装置可能会有帮助.但是并没有得到广泛使用。现在科学家想到了一个更便宜、更有效的方法。由此可推断路旁信号装置没有得到广泛使用的原因可能是它费用太高。故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3426915.html
相关试题推荐
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Sleepiscrucialforgoodhealth.Ithelpsmemoryand【B1】______,keepsyouf
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,
ThenorthernItaliancityofMilanbannedalltrafficfromitsstreetsfor1
ThenorthernItaliancityofMilanbannedalltrafficfromitsstreetsfor1
ThenorthernItaliancityofMilanbannedalltrafficfromitsstreetsfor1
随机试题
WorkisaveryimportantpartoflifeintheUnitedStates.WhentheearlyP
Thereissomethingbadlywrongwiththewaystandardsforschoolsciencebei
Thepooroldconsumer!We’dhavetopayagreatdealmoreifadvertisingdid
中国国画的根源可以追溯到新石器时代的陶器(Neolithicpottery),比如鱼、青蛙、鹿、鸟、花、树叶的形状。最早的中国汉字是象形文字(pict
HowtoWriteaBookReviewI.Thedefinitionofabookr
Althoughfewwoulddenythatit’sbettertoberichthanpoor,forsomepeop
某市土地储备中心准备拍卖一块城市中心区的空地,规划用途为商住两用,E房地产开发公
商品流通功能是由流通运行内在要素的相互作用所决定的,是其相互作用的内在规律的客观
在纵向承重体系中,由于( )承受的荷载较大,因此在此墙上开门、开窗的大小和位置
慢性粒细胞白血病与类白血病反应最主要的区别是A.外周血白细胞计数高 B.外周血
最新回复
(
0
)