| SignalGuru: leveraging mobile phones for collaborative traffic signal schedule advisory Recent countries visiting this post |  |
 | 3 | United States |
 | 1 | China |
 | 1 | Sweden |
| SignalGuru: leveraging mobile phones for collaborative traffic signal schedule advisory Recent countries visiting this post | |
| 3 | United States |
| 1 | China |
| 1 | Sweden |