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If you want to improve your travel time along some of Clark County’s busier roads, turn your Bluetooth device to “discoverable” mode.

Clark County traffic engineers — along with engineers from the state of Washington and the city of Vancouver — have in place a system that can detect Bluetooth devices in discoverable mode.

The program is being funded primarily through a $540,000 federal grant, with a small match from the local governments.

And with some 900 vehicles traveling through the Andresen corridor during peak travel times, even a small sampling is enough to give information on how quickly cars are moving along the roadways.

“Right now, we are seeing between 3 and 5 percent of traffic broadcasting in discoverable mode,” said Rob Klug, traffic signal operations and engineering lead at Clark County. “From that, we can track MAC addresses and … get a timestamp of when cars enter and exit the area we are scanning. From there, the next step, we can make traffic signal settings based on (the information).”