Jim, you are absolutely correct, tank will easily run them over. Therefore to make them really anti-tankish, they reinforced 11 blocks with 11 tankproof cops that come as a package deal...
John, as you might have noticed they had one cop per block on guard ( 11 for 11 , if you carefully count them ), the one with vicious look is actually not following his duties while staring at passing lady's curvatures...