S Linden Avenue & Scott Street Grade Separation Project

Background

The Cities of San Bruno and South San Francisco have partnered to sponsor a project to study the creation of grade separations at the railroad crossings located at Scott Street in San Bruno and South Linden Avenue in South San Francisco. Grade separations improve safety, reduce the need for train horns, and improve traffic flow by completely separating train traffic from vehicle, bicycle, and pedestrian traffic. The Scott Street crossing is the last railroad crossing in San Bruno that is not grade separated.

In 2019, the Peninsula Corridor Joint Powers Board adopted a long-range service vision that will seek to significantly increase Caltrain service through 2040. In the future, High Speed Rail trains will also be using the Caltrain tracks on the Peninsula. Below are some statistics related to these changes:

• The total number of trains traveling in both directions will increase from 10 per hour to 24 per hour during weekday peak service times
• The total number of trains traveling in both directions will increase from 92 per day to 398 per day on weekdays
• The amount of time the crossing gates will be down at Scott Street will increase from 10 minutes out of each hour to 19 minutes out of each hour during weekday peak service times

To mitigate the effects that the increase in trains will have on safety, traffic, and noise, the City of San Bruno explored options for a grade separation at Scott Street. The project study report was completed in 2021. The City preferred an alternative that consisted of slightly raising the railroad tracks, closing Scott Street to vehicular traffic, and constructing a pedestrian and bicycle undercrossing.

Meeting Details

January 28, 2025 Study Session

Frequently Asked Questions

View the Scott Street Project Frequently Asked Questions (PDF).