US and European rail infrastructures are old and under-maintained. One expects a little bit more from what is probably the most financially powerful country and not to mention, oh-so-proud of its achievements.
The whole point of buying and copying technology from other countries is to improve on it. Make it faster, better, cheaper and then sell it back to those countries. Somewhere along the line, safety is forgotten, because well, it would not make it faster, cheaper and better.