The state government is committed to spending $73 billion in infrastructure across NSW over the next four years - more than what the nation is spending in the next decade, the premier says.

Speaking at a major projects forum in Sydney, Gladys Berejiklian boasted about the state’s growth, infrastructure and success in becoming Australia’s strongest economy.

“In the next four years, as we invest $73 billion in infrastructure across our state, that’s more than the nation will be spending in the next decade,” she said on Monday.

“No small feat that coming from a place where we were last in the nation, we are now the strongest economy and (have) the strongest budget position.”

The biggest “game changer” project for NSW is the western Sydney airport set to open in 2026 with an “aerotropolis” city to be built around it.

The premier hopes it will be home to Australia’s space capital, freight logistics hub and the jobs of the future.

But, the government continues to remain tight-lipped about a train link to connect the new mega city and the Badgerys Creek airport to the rest of NSW.

“Without giving too much away, in our discussions with the federal government (about) connecting the greater west to the north and south will also give huge opportunities,” Ms Berejiklian said.

It’s not just Sydney that’s seeing an infrastructure boom, with one-third of the government’s investment in rural and regional NSW, Ms Berejiklian says.

“When I go to places like Dubbo or Griffith and see cranes in the sky, it gives me a great sense of comfort,” Ms Berejiklian said.

The wide-spread infrastructure investment has also contributed to business investment in the state, which has increased by 10 per cent over the past 12 months, in comparison to the 20 per cent decrease across Australia, the premier said.

By Dominica Sanda