Correct - a catastrophic blowout can get one a vehicle out of control crashing into the roadblock, bystanders, LEO’s, you name it. I’m guessing that on a road with few turnoffs you put ‘em at least a mile up the road in a spot where they can’t be avoided (if possible). Then wait for them to take effect.
Maybe someone with actual experience can comment.
Well, I never ran over one, but in the land of Los Angeles TV Helicopter Police chases, I have learned all I know from the LA chopper pilots and newscasters.