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Here in the USA tires have to have a specific amount of tread to pass inspection. More trucks are using side panels under the trailers to reduce air drag so they would be more detectable. The sensor should be set for 2 meters minimum safe height. Deer are very unpredictable. Even sensing for body heat would be tricky. Sound devices or beeping the horn in one second intervals seems to work best so far. I still pray for the deer on rural roads.
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