Create a localized field that disables the phone except for 911 calls when the car is in motion. If the car is not moving the phone can do anything. Once the

Create a localized field that disables the phone except for 911 calls when the car is in motion. If the car is not moving the phone can do anything. Once the car starts moving everything except 911 calls is disabled. Now this can't be just a Bluetooth signal or RFID signal because those can extend far outside the car and disrupt other peoples phones. So you need to limit the transmission of the disabling signal to only the interior of the car, preferably just near the driver. Using the near field effect of radio might be a solution, see this paper: https://dl.acm.org/doi/10.1145/3300061.3300120 https://dl.acm.org/doi/10.1145/3300061.3300120 This could give you fairly precise proximity limits which could be used to define a zone of no operation around the driver. It would likely extend a little beyond the outside of the car, but if widely used and known about would not cause most people any issues, they'd know to move a foot or two away to regain use of their phone. In most circumstances they'd never be close enough to be affected. A similar solution might be to use skin capacitive conduction effects to create a body area network for the driver. The driver sits on the seat and if the car is moving a signal is capacitively coupled to their body from the seat. The outside of the phone is metal or has an internal capacitive sensor and conducts the signal to circuitry in the phone disabling it. As long as the driver is in the seat and the car is moving the phone does not work (again except for 911 calls). This might be easier to defeat by placing something on the seat, but perhaps some capacitive or radar sensing of the driver could make that difficult or could detect an attempt to defeat it. If you want the phone to continue to be disabled at stoplights/signs then have the stoplight/sign talk to the car and tell it to disallow use of the phone, just the same as if it was in motion. If a driver wants/needs to use their phone they have to stop the car somewhere away from a stoplight/sign. Or disallow use of the phone as long as the driver is in the drivers seat, though that seems more dangerous since it forces the driver to get out of the car if they want to make a call (though again 911 calls could be allowed). Probably a machine learning classifier could tell when the phone is in a moving car using accelerometer signals, but I'm not sure I'd trust it to be accurate enough. Extra points if you can figure out how to let background processes on the phone keep running so that data transfers are not halted while still blocking use of the phone (maybe just as simple as disabling the screen showing only an emergency button? But then there are also voice assistants. Maybe it's ok to let those function?)