Of the 121 individual pursuit accidents that I have personally examined over the last 12 years from throughout the United States and Canada, every single one of them would have been prevented if the pursuing officer had only followed the department's pursuit policy, whatever it was. In only one of those accidents, incidentally, was the pursuing officer held accountable for having violated the department's policy and therein lies the problem.
Administrative control of high speed pursuits is a four legged program and those legs are policy, training, supervision and accountability. If any of those legs are missing the program will fail. Nowadays, every police department has a policy, although the quality may vary widely between agencies. Meaningful training in the policy is rare and, accordingly, it is not too surprising when it is not followed in actual practice. Most pursuit training is focused on how to drive fast under the controlled conditions of an emergency vehicle operation course. Little attention is given to when and when not to pursue.
Can you imagine a similar approach to firearms training? And, it must be remembered that no matter how well the police are trained to drive, none of that skill is transferred to the fleeing suspect.
Next, why supervision? Because, most policies rely upon the pursuing officers to exercise good judgment when it has been manifestly demonstrated that they often will not. If they did, most pursuits would be discontinued before they were terminated by deadly accidents.
The facts are that officers become caught up in the spirit of the chase, develop tunnel vision that makes them oblivious to what is going on around them and 96 percent focus on catching that s.o.b. if it's the last thing I ever do (unfortunately, it is for an average of 10.5 officers per year). The objectively detached intervention of a well-trained sergeant is the best answer to an officer becoming emotionally invested in the outcome of a pursuit that should be stopped before it is too late. Expecting officers to voluntarily terminate pursuits is a near hopeless expectation because very few willingly or reasonably do so.