More than half a million Super Gold Card holders are now eligible for free off-peak public transport.
It's part of a new government initiative launched on Wednesday in the main centres.
Auckland Regional Transport Authority communications manager Sharon Hunter says buses, trains and harbour ferries are a critical means of getting about for many seniors.
She says the government has allocated $18,000 per annum for each region for the initiative.
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On weekdays, the hours of travel are from 9am to 3pm and from 6.30pm until the end of the day's service.
Auckland has an exception to the national rules and people can travel anytime from 9am.
Card holders are able to use the service at anytime during the weekend.