Comment by thisismyanon2

  People rag on the USA refusing to allow higher speeds without PTC 

Who does this? The US barely has PTC because freight companies continue to fight it tooth and nail. You only need to look at the Amtrak Cascades crash to see how subpar even modern rail infrastructure is in the US. Neither is PTC a panacea as anyone who is old enough to remember when Thales' craptastic train control system sent a Muni train the wrong way down the wrong tracks in San Francisco.