Existing regulations only cover trains operating up to 160 mph. The agency is basing its upgraded noise standards on European Union regulations, an established standard that is largely consistent with U.S. standards. Dive Insight:While Amtrak Acela trains in the Northeast Corridor can reach speeds up to 160 mph, two high-speed rail projects underway in California and Nevada plan to operate 220 mph trains. The FRA estimates the new rule could save high-speed rail developers $100 million over the next 30 years. The U.S. Department of Transportation, under the Trump administration, canceled $4 billion in grants to the California High-Speed Rail Authority and ended support for a proposed Dallas-Houston high-speed rail line.