I agree that a blinking red light and constant beep, like the seatbelt warning, should be how TPMS is implemented for confirmed low readings. For dead/missing sensors, the yellow standby warning is more appropriate. If that's not enough, how about a stick-shaker like the stall warning in airplanes? If you drive >30MPH for >30 seconds with at least one tire >25% down on pressure, a vibrator motor in the steering wheel shakes. That send an unmistakable message to the driver that, yes, they do need to pull over and fix it. Now. Underinflated tires are really only "dangerous" at higher speeds. For mudding and other off-road activities