Interstate 505

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Interstate 505 runs north from I-80 near Vacaville to Winters and I-5 near Dunnigan. The freeway provides a fast route from the San Francisco Bay Area to Northern California and the Pacific Northwest.

Interstate 505 California Guides

Originally incorporated in the Interstate 5W loop west from the Central Valley to Oakland in 1964, initial construction for Interstate 505 took place at the south end with I-80 in 1968. Most of the freeway in Solano County was built in 1974. The Yolo County portion of I-505 was constructed as a two lane highway in 1959, with expansion to four lanes in 1980.

The northern section of Interstate 505 traverses a remote area across the Dunnigan Hills. 03/31/05
Interstate 505 scenes
An entrance ramp links Orange Drive, the east side frontage road for I-80, with Interstate 505 north at Vacaville. 09/22/00
The northbound ramp for I-505 from Orange Drive connects the Vacaville Premium Outlets and a bevy of retail lining both sides of I-80 with the freeway leading north to I-5 for Redding. 10/24/00
Paralleling Oat Creek, Road 12A meanders through Oat Valley to a diamond interchange (Exit 31) with Interstate 505. 12/29/04
Freeway entrance for the northbound on-ramp to I-505 from Road 12A in the Dunnigan Hills. This assembly was missing by 2007, and subsequently replaced with a shield using non-standard font. 12/29/04
Entrance ramp leading to northbound I-505 from Allendale Road (Exit 6). Tubbs Road lines the east side of the freeway to Wolfskill Road south of Winters. 07/11/18
I-505 continues south from Allendale Road at Exit 6 into Vacaville. 07/11/18

Photo Credits:

09/22/00, 10/24/00, 12/29/04, 07/11/18 by AARoads

Connect with:
Interstate 5
Interstate 80
State Route 16

Page Updated 01-15-2023.

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