In Palo Alto, a project to reduce noise from train horns at Caltrain crossings has been delayed. The city is seeking "quiet zone" designations from the federal government for its four rail crossings. The delay is due to concerns about traffic congestion near the tracks.

Normally, trains are required to sound their horns to signal their approach to crossings. Further details about the quiet zone project and its delay are available from local news sources, including NBC Bay Area.