Road junction
| Alemany Maze | |
|---|---|
| Alemany Interchange | |
_-1.jpg) The Alemany Maze (seen from the northwest, 2019) | |
| Location | |
| San Francisco | |
| Coordinates | 37°44′07″N 122°24′24″W / 37.7352°N 122.4068°W / 37.7352; -122.4068 |
| Roads at junction |  US 101 I-280 |
| Construction | |
| Maintained by | Caltrans |
The Alemany Maze is an interchange between the James Lick Freeway (U.S. Route 101) and the John F. Foran Freeway (Interstate 280) in the city of San Francisco. Alternative names for this highway feature are Alemany Interchange and The Spaghetti Bowl.
History
The Alemany Maze gets its name from Alemany Boulevard, which is named for Joseph Sadoc Alemany, who in 1853 became the first Archbishop of San Francisco.
The Alemany Maze is an interchange that originally controlled the separation of traffic travelling between the James Lick Freeway, Bayshore Boulevard, and Alemany Boulevard. The former US 101 Bypass, which followed Bayshore Boulevard to the south, separated from the old US 101 alignment at the Maze. The Alemany Boulevard routing of US 101 was eventually replaced by the construction of the Southern Freeway, later renamed the John Foran Freeway. The bridge leading US 101 over Alemany Boulevard (at a section called Alemany Circle) was constructed in 1950 and renewed in 2020. The routing of US 101 was shifted to the Bayshore Freeway in 1964, with the former US 101 freeway becoming renumbered as part of I-280.
According to SFGate, "Alemany" is pronounced "al-UH-mainy" locally.
Maze features
The most notable features of the Alemany Maze are the double-deck ramps to and from US 101 from the south and the double-deck portion of I-280 northeast of the interchange. Although overall a north–south freeway, I-280 actually runs east–west through the interchange. The word maze refers to the series of interchanges necessary for a vehicle to maneuver in order to navigate their way from a multi-lane freeway to a narrower distribution structure of lanes which funnel to connector exit ramps, similar to the better known MacArthur Maze. Traffic reporters use these words combined with the Alemany Maze to indicate its bottleneck status. The San Francisco Chronicle has described it as "a spaghetti tangle of freeway" which "ike a tentacled octopus stretches north to the Bay Bridge and south to Daly City and San Francisco International Airport, with prongs swooshing in every direction".
In spite of its size and complexity, like the MacArthur Maze, it does not allow full freedom of movement: drivers approaching the interchange in the southbound direction on either highway cannot directly access the northbound direction of the other highway.
See also
References
- "Design and construction details of the Alemany Interchange". Archived from the original on July 14, 2011. Retrieved March 25, 2007.
- Todd Lapin (May 10, 2011). "Nomenclature Update: Introducing "The Spaghetti Bowl"". Retrieved December 14, 2022.
- "101 Alemany Construction Information & FAQs | Caltrans". dot.ca.gov. Retrieved December 6, 2024.
- ^ Swan, By Rachel (October 2, 2019). "You've been warned: 'Carmageddon' coming to Highway 101 in SF in July". San Francisco Chronicle. Retrieved December 6, 2024.
- US Highway 101, San Mateo/San Francisco Area, 1964 entry.
- Graff, Amy (February 22, 2020). "Things people say that show they're not from the SF Bay Area". SFGATE. Retrieved December 6, 2024.
- "SC solutionPDF i-280/US-101 interchange" (PDF). Archived from the original (PDF) on July 9, 2008. Retrieved July 18, 2008.
External links
- US-101 Deck Replacement April-May 2020 Timelapse video showing the Alemany Maze up close from various angles, published by Caltrans as part of the documentation of a 2020 project to reconstruct parts of the structure