3 ms·How well do they work to reduce the speed of drivers high on cocaine and PCP?by junofan 3y agoHow well do they work to reduce the speed of drivers high on cocaine and PCP?pc86 3y agoIs there an epidemic of people using cocaine and PCP then speeding around in their cars that I'm not aware of?M95D 3y agoIn some places, they confiscate their car.