Eden Park's capacity is 50,000.
Eden Park chief executive Guy Ngata said All Blacks fans need to match their Lions counterparts.
"From what we observed in the first test, the British and Irish Lions fans set the pace when it came to getting to the stadium well ahead of kick-off," he said.
"With what we saw from the fans at the first two tests, this series decider promises to be the most amazing live sport experience in New Zealand for years and we don't want fans to miss out on any of the action."
Ngata said both public transport and the fan trail were popular with fans attending the first test of the series.
"With public transport free with all match tickets up to four hours before kick-off, there's no reason to leave it to the last minute."
The gates at Eden Park open from 4.30 pm on Saturday.
Free public transport for match ticket holders includes travel from four hours before the match on trains and special event bus services from Northern Busway stations, Takapuna, Midtown, Newmarket, Mt Eden, Pakuranga, Botany and Manukau.
After the match special event buses returning to those destinations depart for one hour after the final whistle while train travel is free until the end of service.