Anybody who's been driving for a while learns to look for the devices buried in the pavement that trigger changes in traffic lights.
But those old devices--you know, make sure your car is directly over the sensor--are being replaced.
Now cameras are being used to gauge traffic waiting for a green light.
The city of Medfordjust installed several of the camera systems along Crater Lake Highway.
We hear how they work, and what drivers should expect.
