The Police Association president doesn't think training police at high speeds on open roads is worth the potential risk.
An exemption to allow training drivers to exceed 100 km/h on roads was brought up to Police Minister Stuart Nash by a member at the Police Association conference last week.
Police staffers receive training as recruits when they enter police college. They are trained driving up to 120km/h on a private track and also practise driving at the appropriate speed limit on open roads and around towns.
The member said not being able to train at speed on open roads was "setting our members up to fail" because fleeing drivers were sometimes going up to speeds of 160km/h.
Officers were only allowed to go above the speed limit when urgent duty driving for an emergency.