The Government might choose to improve the information provided to the public about the advantages of active safety features, the ministry said.
Between 1997 and 2005, improvements to cars reduced rural road deaths by 15.7 per cent and urban road deaths by about 20 per cent.
The ministry also noted several other areas where road safety might be improved.
With regard to speeding, the ministry said the Government could consider further measures to discourage people travelling over the limit, including introducing demerit points for speed camera-detected offences.
There might also be room for roading improvements, such as installing more median barriers on high-risk, high-volume rural roads.
With regard to the impact of alcohol in road crashes, the briefing said it would be another year or two before the ministry could assess changes made from 2010, including the zero drink drive limit for drivers aged younger than 20 years, and for recidivist drink drivers.
The ministry said international research backed reducing the drink drive limit below 0.08 blood alcohol content, and results from Government-commissioned research into how such a change would affect New Zealand was due in August next year.