VIDEO: Take a Tour of the Construction Inside the Twin Peaks Tunnel

We are now halfway through the project and on track to finish on schedule. We want to thank the residents, merchants, and riders for their patience as we complete much-needed upgrades to the century-old Twin Peaks Tunnel. With 100 years of service under its belt, the Twin Peaks Tunnel needs extensive work to its interior to continue to operate safely and reliably for years to come.

The tunnel's infrastructure, including the tracks, walls and drainage systems, must be maintained in a timely manner to keep up with the demands of the Muni system.

Take your own tour with this video and photo round-up of the progress and advancement of the project. Be sure to check out previous blog posts we’ve done on the history of the tunnel, and check out the Rider Guide when trip planning.