Express trains one hundred and fifty miles per hour.

John Elfreth Watkins : engineer
"Exactly 100 years after writing those words, to the very month, Amtrak’s flagship high-speed rail line, the Acela Express, opened between Boston and Washington, DC. It reaches top speeds of 150mph, although the average speed is considerably less than that. High-speed rail in other parts of the world, even in 2000, was considerably faster."

Tom Geoghegan. "Ten 100-year predictions that came true", BBC News Magazine. 11 Jan 2012.