Geary Subway

The Geary Subway is a proposed rail tunnel underneath Geary Boulevard in San Francisco, California. Several plans have been put forward since the 1930s to add a grade-separated route along the corridor for transit. San Francisco Municipal Railway bus routes on the street served 52,900 daily riders in 2019, the most of any corridor in the city.

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).