THE state government will start building roads to open up 27,000 housing lots at Flagstone as Queensland's population booms.
The government expects population in the 7000 hectare Flagstone Priority Development Area west of the Mount Lindesay Highway to hit about 120,000 in the next 40 years.
A total of $31 million will be pumped into the Teviot Road and New Beith Road projects, as the government looks to address land supply issues amid strong migration to Queensland during the pandemic.
Works are set to begin after infrastructure agreements are finalised in November.
It comes after a resident launched a petition calling for a second access road to connect Flagstone and New Beith Road, raising concerns about increasing congestion and safety in the event of bushfires.
The state government also will put $5.91 million towards a road and water main in the Ripley Valley PDA, which will support development at the Providence estate, Cedar Heights and White Rock.
Deputy premier Steven Miles said people moving to Queensland in their droves had put pressure on land supply.
"Prioritising and investing in critical infrastructure is key to delivering communities that offer more affordable and diverse housing options along with the lifestyle only Queensland can offer," he said.
"The new infrastructure will be key to contributing to land supply and housing affordability in one of south-east Queensland's growth corridors."
Jordan MP Charis Mullen said the investment would bring the New Beith Road build forward, creating a second access road for Flagstone residents.
"Along with an extension of Teviot Road, the $31 million will deliver two key road corridors that will comprise dual carriageways with separated bike paths and footpaths," she said.
"Importantly, the project will also create more than 165 local jobs."
Pacific International Development Corporation development director Stephen Harrison said the investment would open up affordable housing opportunities.
"It will also result in the acceleration of significant investment by the private sector to complement the road construction works," he said.
The state government is also investing in infrastructure across other parts of the south-east, which it says will make more than 50,000 residential lots available.
Areas where money is being invested include bayside Redland Bay and Bahr's Scrub at Logan.
Mr Miles said it was important to have infrastructure in place for the expected population growth in Greater Flagstone and Ripley Valley.
"While Covid has certainly spurred an increase in interstate migration, we would expect to see further increase over the coming years in the leadup to the 2032 Olympic and Paralympic Games," he said.
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