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Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles County, CA

Arroyo Seco Parkway, Los Angeles to Pasadena, Los Angeles, Los Angeles County, CA

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Significance: The Arroyo Seco Parkway (Pasadena Freeway) was the first divided-lane, high-speed, limited-access road in the urban western United States and the first stretch of road for what would become the extensive Los Angeles freeway network. The approximately six-mile initial stage of the 8.2-mile roadway, completed in 1940, was envisioned as both a scenic road traversing the Arroyo and a vital traffic conduit linking the expanding cities of Pasadena and Los Angeles. Engineers and planners attempted to blend landscaping and native plants into the overall design while implementing safety features appropriate for high-speed travel. Construction proceeded alongside the installation of the federally assisted Arroyo Seco Flood Control Channel, necessary to ameliorate seasonal flooding. As road construction proceeded southward towards downtown Los Angeles in the early 1940s, the road began to more closely resemble a high-speed freeway. As a prominent example of the evolution from recreational parkways to more utilitarian high-speed freeways, the Arroyo Seco Parkway marks an important stage in the history of American transportation engineering.
Unprocessed Field note material exists for this structure: N735
Survey number: HAER CA-265
Building/structure dates: 1938-1953 Initial Construction



Historic American Engineering Record, creator
California State Department of Highways
Courtelyou, Spencer V
City of Los Angeles
Aldrich, Lloyd
City of Pasadena
Hincks, Harvey W
City of South Pasadena
Clough, Frank H
Automobile Club of Southern California
East, Ernest E
Works Progress Administration
Public Works Administration
U.S. Bureau of Public Roads
Johnston Andrew, field team
Brown, Christopher B, field team
Dalbey, Christopher, field team
Gonzalez, Arabella, field team
Mainster, Sydney, field team
Hao, Peter, field team
Grogan, Brian, photographer
Gruen, J Philip, historian
Lee, Portia, historian


Los Angeles, California, United States34.05223, -118.24368
Google Map of 34.0522342, -118.2436849


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