Elaine Thompson / AP

Seattle is using drivers' cellphones to help improve traffic flow around the city. KOMO-TV reports that the Seattle Department of Transportation has placed 200 flat disc antennas on top of traffic signal boxes throughout downtown Seattle and the Mercer Corridor.

When Wi-Fi is enabled on a wireless device, such as a phone, tablet or laptop, the antennas pick up the devices unique signal and track it. Seattle's traffic control center says engineers can then track the time it takes a device to get from one antenna to another and hopefully adjust signal timing to help traffic plow.

Bellamy Pailthorp / KPLU

Researchers want you to grab the camera, head to the beach and capture this weekend's king tide.

The highest tides of the year are taking place, and the state is asking citizens to help document potential impacts of rising sea levels.