Sydney lord mayor Clover Moore says a shake-up of bus services in the city's south east is "just fiddling around the edges", as new figures reveal the extent of pressure on public transport from a population boom.

The number of passengers using Green Square station on a weekday has surged by almost 80 per cent over the last three years, from 11,680 in 2014 to about 21,000 in 2017, figures from the state's transport agency show.

Patronage at the station on the Airport Line rose, on average, at a rate of 25 per cent annually.

Passengers were temporarily stopped from entering platforms at Green Square station on Tuesday morning.

The rapid increase in demands on public transport comes as Prime Minister Scott Morrison declared this week that Australians were telling him "enough, enough, enough" on population growth because their roads were clogged and buses full.