Vowing to find new ways to stimulate the sputtering economy, President Barack Obama will call for long-term investments in the country's roads, railways and airports that would cost at least $50 billion, administration officials said.

The infrastructure investments are one part of a package of targeted proposals the White House is expected to announce in hopes of jump-starting the economy ahead of the November election. Obama will outline the infrastructure proposal Monday at an event in Milwaukee marking the Labor Day holiday in the U.S.

While the proposal calls for investments over six years, officials said spending would be front-loaded with an initial $50 billion to help create jobs in the near future. The officials spoke on the condition of anonymity to discuss the proposals ahead of the president's announcement.

The goals of the infrastructure plan include: rebuilding 150,000 miles (241,000 kilometers) of roads; constructing and maintaining 4,000 miles (6,400 kilometers) of railways, enough to go coast-to-coast; and rehabilitating or reconstructing 150 miles (240 kilometers) of airport runways, while also installing a new air navigation system designed to reduce travel times and delays.

Obama will also call for the creation of a permanent infrastructure bank that would focus on funding national and regional infrastructure projects.

Officials wouldn't say what the total cost of the infrastructure investments would be, but did say the initial $50 billion represents a significant percentage. Officials said the White House would consider closing a number of special tax breaks for oil and gas companies to pay for the proposal.

Obama made infrastructure investments a central part of the $814 billion stimulus Congress passed last year, but with that spending winding down, the economy's growth has slowed. Officials said this infrastructure package differs from the stimulus because it's aimed at long-term growth, while still focusing on creating jobs in the short-term.

In an interview Monday on CBS television, Labor Secretary Hilda Solis said the plan Obama was to unveil Monday would "put construction workers, welders, electricians back to work ... folks that have been unemployed for a long time."

With the unemployment rate ticking up to 9.6 percent, and polls showing that November congressional elections could be dismal for Obama's Democrats, the president has promised to unveil a series of new measures on the economy.

In addition to Monday's announcement in Milwaukee, Obama will travel to Cleveland Wednesday to pitch a $100 billion proposal to increase and make permanent research and development tax credits for businesses, a White House official said.

While the idea is popular in Congress, coming up with offsetting tax increases or spending cuts has been a stumbling block. Similar to his proposal to pay for the infrastructure investments, Obama will ask lawmakers to close tax breaks for oil and gas companies and multinational corporations to pay for the plan.