Our traffic signal crew cut and installed traffic signal inductive loop detectors in Frederick County, Maryland. An inductive loop is a coil of wire embedded in the road’s surface which senses the weight of a vehicle and tells the signal to change. To install the loop, our crews cut a groove in the asphalt with a diamond saw, placed wire in the groove and sealed it with a rubbery compound. You can often see these big rectangular loops cut in the pavement because the compound is obvious. Having detectors greatly increases the efficiency of traffic signals.
April 23, 2013