the horns are getting better with grade separation and stations that don’t have crossings. they are very loud. you can hear them all the time. HSR will add 4 more trains per hour, which means a lot more train horns.

hopefully more grade separation is done by then. i can’t imagine any city surviving without it. there was a study done by caltrain about this and some crossings are blocked 20% of the time during peak hours today - and they want to increase train count by like 30%