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If you use Google Maps for mobile with GPS enabled on your phone, that’s exactly what you can do. When you choose to enable Google Maps with My Location, your phone sends anonymous bits of data back to Google describing how fast you’re moving.

hkchan(0)

When we combine your speed with the speed of other phones on the road, across thousands of phones moving around a city at any given time, we can get a pretty good picture of live traffic conditions.

We continuously combine this data and send it back to you for free in the Google Maps traffic layers. It takes almost zero effort on your part — just turn on Google Maps for mobile before starting your car — and the more people that participate, the better the resulting traffic reports get for everybody.

http://googleblog.blogspot.com/2009/08/bright-side-of-sitting-in-traffic.html

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Last Updated: 2009-10-10
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Replies, comments and Discussions:

工作学习 / 科技领域杂谈 / Google Street View is now in Canada, check your own home. -hkchan(0); 2009-10-7 (#5594858@0)

Thanks, just saw my home from there, nice :-) -ddlldd2000(hunting); 2009-10-7 (#5594934@0)

there must be a good business use that we can think of. Google would not invest so much money if there is not a just cause....$$$ -hkchan(0); 2009-10-7 (#5594944@0)

it's very slow at this moment, or just me? -ccwq(ccwq); 2009-10-7 (#5594946@0)

I am using my blackberry for tethering but the speed is OK. -hkchan(0); 2009-10-7 (#5594966@0)

看到我们家的旧车还停在driveway上面，另外，车牌被特意模糊掉了，真不错 -haihai(享受阳光); 2009-10-7 (#5594959@0)

I believe they cover your face as well. What is your address, let me see what car you have..... Just kidding! -hkchan(0); 2009-10-7 (#5594969@0)

不错，太神奇了，真没想到google做得这么好 -binghongcha76(一只大猫); 2009-10-7 (#5595350@0)

这个不砸地。GOOGLE做的最好的是实时TRAFIC地图，利用道路车辆驾驶员的手机与基站之间的信号，还有车辆中GPS与卫星之间的通讯信号，实时地给出道路流量信息，GOOGLE希望大家开车时尽量打开手机中的GPS功能，因为信号越密集，说明车流越多，提供的数据越准确。。。 -noproblem(密西洒家。o O); 2009-10-7 (#5595375@0)

GPS是单向接受。。没有你说的那么玄乎。。 -z24(Quick! Winterizing); 2009-10-7 (#5595377@0)

you are damn right. -largesuv(黑熊走进玉米地); 2009-10-7 (#5595420@0)
对，我也记得GPS是单向接收卫星信号，利用3颗卫星的值计算出当前位置，就像一个收音机，GPS接收机不发射任何信号 -binghongcha76(一只大猫); 2009-10-8 (#5595849@0)

the cellphone can send the location info outbound -anthonylo2008(anthonylo); 2009-10-8 (#5596138@0)

A-GPS，通过基站辅助定位。 -old_taoist(old_taoist); 2009-10-10 (#5599686@0)

大多数人手机根本没有GPS功能，更别说aGPS了；更多人用 Standalone GPS 单买的GPS跟手机没有关系，不交钱哪家基站也不让你随便使。 -w4b(Watch for Beauty); 2009-10-10 (#5599691@0)
呵呵，终于碰到懂行的了。GOOGLE就是利用这个技术实时监控交通流量，越来越多的手机有GPS功能，通过基站辅助定位可以实时扑捉手机的位置，但也带来隐私和安全隐患。。。 -noproblem(密西洒家。o O); 2009-10-10 (#5599870@0)

If you use Google Maps for mobile with GPS enabled on your phone, that’s exactly what you can do. When you choose to enable Google Maps with My Location, your phone sends anonymous bits of data back to Google describing how fast you’re moving. -hkchan(0); 2009-10-10 {511} (#5599884@0)
When we combine your speed with the speed of other phones on the road, across thousands of phones moving around a city at any given time, we can get a pretty good picture of live traffic conditions.

We continuously combine this data and send it back to you for free in the Google Maps traffic layers. It takes almost zero effort on your part — just turn on Google Maps for mobile before starting your car — and the more people that participate, the better the resulting traffic reports get for everybody.
http://googleblog.blogspot.com/2009/08/bright-side-of-sitting-in-traffic.html

Yes, by using this technology, you can click TRAFIC icon on Google map and get live traffic display to monitoring traffic trend simultaneously, it automatically refresh every few minutes, it's cool and hot!。。。 -noproblem(密西洒家。o O); 2009-10-10 (#5599912@0)

Make sure you have a good data plan before you use this services. It would send / receive data at the same time. -hkchan(0); 2009-10-10 (#5600021@0)

那么手机工厂总是交通堵塞 -win(秋天的菠菜); 2009-10-10 (#5600394@0)

哈哈，脑筋急转弯 -w4b(Watch for Beauty); 2009-10-10 (#5600401@0)

不会玩啊，richmond hill 能看到吗 -ttl(羊肉泡馍); 2009-10-8 (#5595488@0)

能看到 -cher(春豆); 2009-10-8 (#5596570@0)

It is not real time.我看到的街景是n个月以前的 -jjbb((wait for tomorrow)); 2009-10-8 (#5595710@0)

假如是real time你就惨啦。 -bdbs(背对背说); 2009-10-8 (#5595730@0)
lol nice try -ccwq(ccwq); 2009-10-10 (#5600276@0)

iPhone Live Traffic in Google Maps Now Works in Canada -hkchan(0); 2009-10-8 (#5596531@0)

i thought live traffic is sent by radio stations' antenna. -wince(courage); 2009-10-10 (#5600409@0)

看完之后的感觉是，以后住址也绝对要算个人隐私了。 -tyrsbw(体验人生百味); 2009-10-24 (#5630546@0)

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If you use Google Maps for mobile with GPS enabled on your phone, that’s exactly what you can do. When you choose to enable Google Maps with My Location, your phone sends anonymous bits of data back to Google describing how fast you’re moving.

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