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Road toll system in Stockholm that allows drivers to get through without stopping and paying.
Roman J
Roman J May 08, 2013
Road toll system in Stockholm that allows drivers to get through without stopping and paying.

I've seen these sensors...

Often 4
Occasionally 6
Rarely 0
Never 1
What is it? 1
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Similar Photos: With the increased bicycle ridership in Columbus, they are implementing sensors for traffic lights (similar to those for cars) storm water diverted through a gate filter \ EchoSonicII ultrasonic level sensor measures liquid height and filter efficiency through gate This would be really cool! I found it online, anyone ever heard of it?

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