Auckland Council staff were looking at installing two electric gates with an access code for people with limited mobility.
The authority was given an estimate of $100,000 to install gates though no quotes had been received.
Arrangements for the traffic ban, including gates, parking for 30 cars and signage, were subject to budget decisions to be made next month.
The process by which the authority decided the ban was criticised by Act leader and Epsom MP David Seymour.
"Mt Eden is special to many people, its governance should be inclusive, but instead we will see electric gates and exclusion resulting from a secretive process."
An all-vehicles ban received overwhelming support in a Herald-DigiPoll survey in January.
In all, 54 per cent of people in Auckland were in favour compared with 68 per cent of non Aucklanders.