The government is being told it must improve public transport before introducing congestion fees.
A new report, called Te Ara Matatika, from the Helen Clark Foundation delivers a list of recommendations to make the fees fair and equitable across the country.
It is expected the Emissions Reduction Plan, to be released on 16 May, will include a charge for motorists passing through busy routes at peak times.
Helen Clark Foundation research fellow and the author of the report Tom James spoke to Corin Dann.
