We at Since You Asked World Headquarters contacted Medford Public Works Director Cory Crebbin, who reminded us that the whatzits are called traffic detection loops.Cory
said they're sensitive enough to detect a bicycle so long as it on top of the loop.He
said if a bicycle is in the travel lane, but not right on top of the sensor loop, it probably won't be detected.
The loops are metal detectors, not scales."The bike needs to contain enough metal components (but not aluminum or other non-magnetic metals) to trigger the sensor," he
said."So carbon fiber frames, etc. may not trigger the sensor, but it may if the crankset, chain, etc. contain enough metal.
It is a fairly sensitive adjustment, so if bicyclists call about a loop they think is not detecting them we go out and check the adjustment," he
said, adding that you did the right thing by not bumping the bicycle off the loop.
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