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Drivers Tend To Kill Pedestrians At Night. Thermal Imaging May Help.
(www.forbes.com)
This is a most excellent place for technology news and articles.
I'm only trained to calibrate the camera systems that tell you when you've drifted out of the lane, but the tool I use is capable of calibrating radar systems if you buy the more expensive accessory package. I'm certain because I have to scroll past the instructions for radar when pulling up instructions/parameters for Lane watch.
Also, for what it's worth the sensors CAN be replaced, but they still have to go through an initial calibration/programming once installed into the car.