U.S. Pursuit expert Dr Geoff Alpert notes that under twenty percent of high speed chases are triggered by major offences in some States, and 1-2% typically result in death/s in regions with lax policies (AAA Foundation report).
The reason NZ's risk may be even higher is our extremely heavy Police presence - combined with the pressure of "performance measures" to be met on each shift. Quotas have made Police bounty hunters and that has had many serious ramifications for road safety.
Restrictive chase policies don't increase anarchy
Studies consistently show pursuits involve drug or drink drivers 1/2 the time, but Pursuit Watch advises pursuing impaired drivers is unwise.
Where policies have been upgraded in the interests of public safety in the U.S.A. road carnage has decreased, and done so in the absence of any reduction in conviction rates for crimes.
For more, go HERE.