Same type of system as the 'Stinger' (spikes they put across road to deflate tyres) they use already. It has to be authorised by the Police control.
good point atomic mate but think of it this way the car is bwelting along the copper switches it off, all dials go off, first thing they do wile still moving try & start it, dont work so pull up the clutch to try & pump it off, locks the wheels, get the clutch down & tryst o brake as the car begins to spin, cant brakes as the wheels lock more cant steer it & the safety kit wont go off by that time its unkown the car could become airborn it could do allsorts you jsut dont know & what if, jsut what if the system fitted to your car mistakenly thinks its been told to shut down (ecu's are complex things they can go wrong & have in the past start bolting this stuff to it more to go wrong) imagine yourself in a lump of metal in the fast lane of the motorway with no control & no whay to warn anyone as of course the hazard lights are electrical & youa hve no electricity (another reason why i like diesel if youc an keep it running it needs no electrical current to make the engine work) there is jsut too much wrong with the idea
I think your missing the point here. It's not something to be used on a crowded motorway, the same way they wouldnt use a stinger in those situations. You got a drunk driver weaving down the road at about 11pm after the pubs closed, heading towards a busy part of town/city. You gonna let him continue or shut the car down? Seems to me its not for high speed chases, but for controlled shutdowns of slower moving vehicles. same as your point about too much could go wrong, I dont think there are any safe ways of stopping a car without the driver doing so.