1918day.year
The Twin Peaks Tunnel in San Francisco, California begins service as the longest streetcar tunnel in the world at 11,920 feet (3,630 meters) long.
San Francisco's Twin Peaks Tunnel opens in 1918, becoming the world's longest streetcar tunnel at nearly 11,920 feet.
In 1918, San Francisco inaugurated the Twin Peaks Tunnel, the world's longest streetcar tunnel at 11,920 feet.
Engineers carved the underground passage through solid rock beneath Twin Peaks to connect downtown with western neighborhoods.
The project aimed to ease congestion and extend public transit to emerging residential areas.
At its opening, the tunnel represented a major feat of urban engineering and boosted San Francisco's streetcar network.
The Twin Peaks Tunnel remains a vital transit artery, still serving riders more than a century later.
1918
Twin Peaks Tunnel
San Francisco
California
streetcar