From coast to coast, state and federal agencies are investing hundreds of millions—sometimes billions—to repair, expand, and modernize the country's aging infrastructure.

These megaprojects, defined by the U.S. Department of Labor as those valued at $35 million or more in funding, are designed to enhance safety, reduce traffic congestion, and promote economic growth, are set to change the landscape of American transportation.

The map below shows where five road megaprojects are in development.

I-85 widening, North Carolina: $600 million

Planning and development is underway for a project in Gaston County, North Carolina, that aims to improve about 10 miles of Interstate 85, from the U.S. 321 interchange (Exit 17) in Gastonia to the N.C. 273 interchange (Exit 27) in Mount Holly.

The plan involves widening I-85 from six to eight lanes, upgrading interchanges, and relocating or replacing roadway and railroad bridges.

I-85 is a crucial highway connecting Gastonia to other towns in Gaston County, serving as an essential route for commuters in the Charlotte metropolitan area.

The proposed improvements aim to reduce congestion and improve traffic flow. Additionally, there's a plan to improve the intersection of U.S. 29/74 and N.C. 7 due to its proximity and connection to I-85.

The current estimated total cost of the project is set at $624,400,000, and construction is expected to complete by 2030.

"Heavy congestion creates unpredictable traffic slow-downs and making daily commutes frustrating for motorists. This construction would improve the ability to serve commuter, regional and through travel," a spokesperson for the North Carolina Department of Transport told Newsweek.

"The project will also improve permanent structures including bridges and drainage as well as pavement structure, providing residents and visitors with reliable infrastructure for decades to come."

I-375 Reconnecting Communities Project, Michigan: $300 million

The I-375 Reconnecting Communities Project aims to transform I-375 and the Fisher Highway into a surface road and utilize the residual parcels for future development and open spaces.

This new surface boulevard will replace three outdated bridges spanning the highway, reconnecting downtown Detroit to Lafayette Park and Eastern Market.

The project is estimated to cost $300 million and will utilize funding from both federal and state sources.

Construction is anticipated to get underway next year, with completion forecast for 2027, though, according to the City of Detroit, a final design has not yet been set in stone.

I-27, Texas: $312.5 million

A 6.9-mile project for the Texas Department of Transportation will add an additional lane to Interstate Highway 27 in Randall County.

The 124-mile-long highway was first constructed in 1969 and runs north from Lubbock to Amarillo.

Extensions of the highway to Raton, New Mexico and Laredo were approved in 2022.

Highway 60, Texas: $69.9 million

Another project for the Texas Department of Transportation, this time a 5.3 mile long one. Construction will involve building acceleration and deceleration lanes, mechanically stabilized earth walls, and a bridge deck.

I-10, Florida: $236 million

This wide-ranging project aims extensively improve the I-10 in Florida's Escambia County.

Work includes the construction of eight new bridges, upgrading three existing bridges and removing one. Lanes will also be added, with existing lanes widened and realigned.

The road, which runs roughly parallel to Highway 90, spans a total of 362 miles and serves as the easternmost section of an east-west Interstate Highway in the southern U.S.

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