The United States is undertaking some of its most ambitious infrastructure projects in 2025. With funding from federal legislation such as the 2021 Infrastructure Investment and Jobs Act and the CHIPS and Science Act, the construction sector is being reshaped across key areas rail, energy, airports, and transit systems. According to Forbes, public sector spending is growing steadily at 5–6 per cent a year, while private non-residential projects like chip factories and data centres are leading in growth. Blackridge Research notes that construction activity continues to be driven by large-scale megaprojects aimed at improving mobility, sustainability, and economic resilience. Below is a look at the top 10 infrastructure projects underway in the US in 2025. 1. California high-speed rail (full system) Sector: Rail Cost: $135 billion Location: California This rail project will span more than 800 miles, connecting key cities including San Francisco, Los Angeles and San Diego. Once complete, it will reduce travel time between LA and San Francisco from 10 hours to 3. The project has created nearly 15,000 jobs and is being funded by both federal and private sources. “The California High-Speed Rail is the most ambitious transportation project in the country,” Blackridge showing . “Its full impact will be seen in reduced travel time and emissions.” 2. Sound Transit 3 (ST3) Sector: Public Transit Cost: $54 billion Location: Washington (Seattle–Tacoma) ST3 will expand the Seattle area’s light rail system by 62 miles and add 37 new stations. The goal is to serve 600,000 daily passengers by 2046. The plan also includes bus rapid transit and commuter rail improvements. “It is a long-term solution to urban congestion and regional connectivity,” according to Blackridge Research. 3. Los Angeles metro 28 by '28 Sector: Public Transit Cost: $42.9 billion Location: Los Angeles, California This initiative aims to complete 28 major transit projects before the 2028 Olympics. While 20 are on track, funding is needed for the remaining ones. The projects include light rail lines, highway upgrades, and new bus corridors. 4. Texas central high-speed railway Sector: Rail Cost: $41.6 billion Location: Texas (Dallas–Houston) This privately led high-speed rail line aims to cut travel time between Dallas and Houston to 90 minutes. The trains will use Japanese Shinkansen technology. However, the project faced a setback when a federal grant was withdrawn in 2025. “This could be a game-changer for intercity travel in the South,” Blackridge noted. 5. Hudson Yards Sector: Urban Development Cost: $25 billion Location: New York City Hudson Yards is the largest private real estate project in US history. Built above active rail yards, it includes offices, homes, parks, and shops. The development contributes over $19 billion a year to NYC’s economy and employs more than 50,000 people. 6. JFK airport expansion Sector: Aviation Cost: $19 billion Location: New York This project includes new terminals, expanded runways, and a central transportation hub. The New Terminal One alone will cover 2.6 million square feet and handle international flights. The aim is to make JFK a world-class airport by 2030. JFK is being transformed to meet the travel needs of the future. 7. Hudson tunnel project (gateway) Sector: Rail Cost: $16.1 billion Location: New York / New Jersey The Gateway Program includes building two new tunnels under the Hudson River and rehabilitating the existing ones. Work started in 2023 and includes utility relocation and concrete casing work at Hudson Yards. The project will ease pressure on one of the busiest rail corridors in the country. 8. Brightline West high-speed rail Sector: Rail Cost: $12 billion Location: California–Nevada This new line will link Las Vegas and Southern California along a 218-mile route. Trains will run at high speeds on dedicated tracks along Interstate 15. The project is expected to be completed by the end of 2028. 9. SunZia Wind and Transmission Project Sector: Renewable Energy Cost: $11 billion Location: New Mexico–Arizona This clean energy project will generate over 3,500 MW of wind power in New Mexico and deliver it to Arizona through a 550-mile transmission line. It is the largest renewable project in US history and could generate $20.5 billion in economic benefits. 10. Los Angeles Metro D Line Extension Sector: Public Transit Cost: $9.5 billion Location: Los Angeles, California The D Line extension will bring subway service from Koreatown to Westwood. The project adds seven stations in three phases and is expected to open fully by 2027. It is funded by local sales tax and state/federal support. The US infrastructure landscape in 2025 reflects a shift towards sustainable transport, cleaner energy, and improved urban design. These top 10 projects, backed by both public and private investments, represent long-term economic planning and changing mobility patterns.
