The National Party has committed to building 10 new major highways at a cost of $10.5 billion if it is returned to power in September.
New mental health initiatives include programmes for preschoolers and "e-therapy" for young people and prisoners.
Prime Minister Bill English says he is surprised the Green Party has "rushed" into a policy to charge water bottlers 10 cents a litre on sales and exports of bottled water.
The National Party has received another $50,000 from the head of milk exporter Oravida, which was once caught up in a conflict of interest claim.
Unemployment would have peaked at well over 7% without the Government's multibillion investment in big construction projects, Finance Minister Bill English says.
