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SVTPerformance's Chain of Restaurants
Road Side Pub
traffic light sensors ?
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<blockquote data-quote="1bad93" data-source="post: 10472676" data-attributes="member: 73849"><p>I'll just throw my 2 cents in here since i used to work for a traffic control company and i used to install these types of loops. Crappy job by the way. When you mix that 2 part flexible sealer, it smells like its going to kill all your brain cells.</p><p></p><p>The loops go between the white lines just like the picture posted earlier. There are special patterns of loops that will detect a motorcycle, but of course they are more expensive to install. And they work on electro-magnetic principles, not weight. A brand new loop, setup correctly should detect a motorcycle, but over time the wires break or corrode, and they dont work as well.</p><p></p><p>Second type of detector is an infrared camera that you will usually see placed on a pole pointed towards the stop line. Most people think they are red light cameras, but they aren't. These have been replacing loops in the recent years because in the northern states, loops can get torn up by pot holes and plows.</p><p></p><p>Intersections that change the lights when an emergency vehicle passes, have a small black tube and flashing light placed somewhere in the intersection. Emergency vehicles have a white strobe light that flashes at the correct frequency to trip the sensor and turn the lights green in that direction. There are portable versions of the strobe light that are used for testing of the system.</p></blockquote><p></p>
[QUOTE="1bad93, post: 10472676, member: 73849"] I'll just throw my 2 cents in here since i used to work for a traffic control company and i used to install these types of loops. Crappy job by the way. When you mix that 2 part flexible sealer, it smells like its going to kill all your brain cells. The loops go between the white lines just like the picture posted earlier. There are special patterns of loops that will detect a motorcycle, but of course they are more expensive to install. And they work on electro-magnetic principles, not weight. A brand new loop, setup correctly should detect a motorcycle, but over time the wires break or corrode, and they dont work as well. Second type of detector is an infrared camera that you will usually see placed on a pole pointed towards the stop line. Most people think they are red light cameras, but they aren't. These have been replacing loops in the recent years because in the northern states, loops can get torn up by pot holes and plows. Intersections that change the lights when an emergency vehicle passes, have a small black tube and flashing light placed somewhere in the intersection. Emergency vehicles have a white strobe light that flashes at the correct frequency to trip the sensor and turn the lights green in that direction. There are portable versions of the strobe light that are used for testing of the system. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
traffic light sensors ?
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