The Fare Structure Review looks at how fares are charged, whether new concession fares are needed, which types of products are preferred and the level of discounts offered to particular groups.
Under the current fare structure, Wairarapa travellers tend to pay more for a 50km trip length than Kapiti users.
Weekend family bus and train passes, half price fares for all young people under 19 years, free transfers and cheaper off peak fares, are some of the proposed changes.