Donald Trump has announced his proposal to privatise the US's air traffic control system, part of his vision for a massive infrastructure overhaul that Democrats say could leave important assets in the hands of powerful corporations and special interest groups.

Senate Minority Leader Charles Schumer blasted Mr Trump’s infrastructure proposal, arguing that financiers would profit while average citizens will be stuck with the bill for projects aimed at trying to improve the nation’s waterways, roads and airports.

The administration's plan “means Trump tolls from one end of America to the other, and huge profits for financiers who, when they put up the money, want to be repaid by the average driver, worker and citizen,” Mr Schumer said.

Along with projects focused on rebuilding highways and waterways, Mr Trump wants to create a nonprofit corporation to take over the role of tracking and guiding airplanes, a task that is currently under the purview of the Federal Aviation Administration.

“Trump’s ideas for privatising air traffic control – which recycle a tired Republican plan that both sides of the aisle have rejected – would hand control of one of our nation’s most important assets to special interests and the big airlines,” said House Minority Leader Nancy Pelosi.

In the White House’s East Room on Monday, with airline company executives in attendance, Mr Trump said the proposal is taking “American air travel into the future”.

Calling the current system “ancient, broken, antiquated” and “horrible”, the President said his reforms would make it safer and more reliable. He also asserted that moving the system to a private non-profit corporation will help speed up the shift from using land-based radar to more precise GPS tools, allowing more direct routes to reduce costs and fuel consumption for airlines.

The FAA has been transitioning toward a GPS system for several years, but it's not scheduled to be fully implemented until at least 2020.

In pictures: President Donald Trump on tour Show all 39 1 /39 In pictures: President Donald Trump on tour In pictures: President Donald Trump on tour 20 May 2017 US President Donald Trump and Saudi Arabia's King Salman bin Abdulaziz al-Saud arriving for a reception ahead of a banquet at Murabba Palace in Riyadh Getty Images In pictures: President Donald Trump on tour 20 May 2017 US President Donald Trump, accompanied by First Lady Melania Trump, and Saudi Arabia's King Salman bin Abdulaziz al-Saud being welcomed at Murabba Palace in Riyadh Getty Images In pictures: President Donald Trump on tour 20 May 2017 US President Donald J. Trump with King of Saudi Arabia Salman bin Abdulaziz Al Saud during a welcome ceremony with traditional sword dancers at Murabba Palace, in Riyadh, Saudi Arabia EPA In pictures: President Donald Trump on tour 20 May 2017 King of Saudi Arabia Salman bin Abdulaziz Al Saud with US President Donald J. 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The President also slammed the Obama administration for investing money in an attempt to upgrade the system, an effort that “totally failed”, Mr Trump said.

“Honestly, they didn’t know what the hell they were doing,” he said. “A total waste of money”.

Mr Trump’s plan would need congressional approval, and both Republicans and Democrats in the past have expressed wariness about transferring the air traffic control duties from the government to a corporation.

Last year, a similar bill championed by Republican congressman Bill Shuster, chairman of the House Transportation Committee, never made it to a vote on the House floor. The White House used Mr Shuster’s bill as a guide to form its proposal.

While major airlines and the air traffic controllers' union are generally supportive of the proposal, certain trade groups – such as the National Business Aviation Association and the General Aviation Manufacturers Association – have said that private air traffic management would give big airline companies too much power and could threaten private aviation in smaller communities.

In a call with reporters, Mr Trump's chief economic adviser Gary Cohn asserted that “there is money to make sure that rural airports get protected”.

Democrats, preferring a much larger infusion of government money, have expressed scepticism over Mr Trump’s overall infrastructure plan for its heavy reliance on private funding.

Mr Trump has proposed to set aside $200 billion (£154 billion) over 10 years for infrastructure, which critics have said is not the big spending that Mr Trump promised during his campaign. According to the President’s budget request, the funds would be used to encourage companies, as well as state and local governments, to invest at least $800 billion in US infrastructure projects.

Calling it a “broken promise” of Mr Trump’s budget request, Democratic congressman Brendan Boyle asserted that the proposal falls short of the $1 trillion Mr Trump pledged during the campaign, one of his few promises that received support from Democrats.

Mr Schumer declared on the Senate floor that “President Trump’s campaign promises on infrastructure are crumbling faster than our roads and bridges.”