The China Aerospace Science and Industry Corporation, or CASIC for short, just announced its new magnetically levitated (maglev) train soared to over 387 miles (623 km/h) during testing. It is the fastest speed ever achieved by a superconducting maglev vehicle, according to the state-owned outfit.

https://robbreport.com/motors/cars/casic-maglev-train-t-flight-record-speed-1235499777/

AND

New cost estimate for high-speed rail puts California bullet train $100 billion in the red

The cost estimate for the initial 171-mile segment now exceeds the $33 billion estimate for the entire 500-mile Los Angeles to San Francisco system when voters approved a bond in 2008.

https://calmatters.org/economy/2023/03/california-high-speed-rail/