You should have google maps for mobile for it along with gps enabled phone.
Choose to enable Google Maps with My Location, your phone will send anonymous bits of data back to Google servers describing how fast you’re moving.
Google will then combine your speed with the speed of other phones on the road, across thousands of phones moving around a city at any given time, so they will get a pretty good picture of live traffic conditions.
this data is then combined and processed and send it back to you for free in the Google Maps traffic layers.
You have nothing to do in it,just run it while entering in car.
Are you worried about the telling the world how fast their car was moving ?
Then Feel free google considers it and have built privacy protections in from the start and you can easily opt out whenever you want to do so.You are seen as anonymous and traffic conditions are calculated as anonymous speed and location information
How to get it free
Google Maps for mobile devices easy to install and use, and that it is easy for people to provide information about their speed. There is no other devices connected to your car and no additional software to buy.

Google Maps is free http://www.google.com/mobile/default/maps.html
It works with most mobile phones, and the number of mobile phones with GPS is growing every day. Some phones, such as T-Mobile and Palm 3G Pre myTouch, come with Google Maps and transport crowdsourcing preinstalled (iPhone Maps application, no support for the operation of crowd sourcing). Google is pleased that many people who use our products, and this scale helps to have our products better.
|
This Blog
|
|
Google Blogs
|
|
Web
|
|
Blog
|
|
News
|
Google Search results optimized for feature phones in Arabic and Hebrew — 40 languages now supported
Wednesday, August 26, 2009 6:30 PM
Forty-language support is an important milestone for a product at Google. We are very excited that by adding support for Hebrew and Arabic, our new optimized mobile Search experience is now available in 40 languages for feature phones.
We launched in 38 left-to-right languages in July, bringing the comprehensiveness of Google’s web search to mobile users around the world. Now Arabic and Hebrew speakers will also be able to benefit from universal search results on their mobile devices.
As a reminder, the new search results format provides more complete support for the universal search results you’re familiar with on your computer. This means that News, Image, Blog, Video and Product Search results blend right into your results pages when available and relevant to your query. Also, many of your favorite Google Search features now appear in the first result in order to provide direct answers to your searches.
The bright side of sitting in traffic: Crowdsourcing road congestion data
Tuesday, August 25, 2009 8:40 AM
This post is the latest in an ongoing series about how we harness the data we collect to improve our products and services for our users. It is cross-posted from the Official Google Blog. – Ed.
What if you could do a little something to improve the world during your daily drive to work? Here are a few ideas: tell everybody in the city when you’re stuck in slow-moving traffic; warn the drivers on the freeway behind you that they should consider an alternate route; tell the people still at home that they should spend another ten minutes reading the morning news before they leave for work; tell your city government that they might want to change the timing of that traffic light at the highway on-ramp. Of course, you can’t just get on the phone and call everybody, and your one traffic report from your one spot on the road might not help much anyway. But if everybody on the road, all at once, could tell the world how fast their car is moving, and we could make it easy for anybody to check that information on their computer or cell phone, well — then we’d be getting somewhere.
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. 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.

