While the 2nd horn is much more bearable, it does show how over/underpasses are needed on the system.
While some may think it's a bit of a waste of money, I certainly don't. Besides being both faster and safer, they also result in a quiet neighbourhood.. It's one thing to have to tolerate a train horn every hour and quite another having to tolerate it every 8 minutes at a MINIMUM all day long late into the evening even on Sundays. This is when local communities start to view GO service in a negative light as the noise levels become intolerable. I think the entire RER sections of GO should be 100% grade separated.