Interstate 505

Interstate 505 marker
Interstate 505
Map
I-505 highlighted in red
Route information
Auxiliary route of I-5
Maintained by Caltrans
Length32.99 mi[1] (53.09 km)
Existed1977–present
NHSEntire route
Major junctions
South end I-80 in Vacaville
Major intersections
North end I-5 near Dunnigan
Location
CountryUnited States
StateCalifornia
CountiesSolano, Yolo
Highway system
SR 480 I-580

Interstate 505 (I-505) is a north–south auxiliary Interstate Highway in the Sacramento Valley in Northern California. It is a spur auxiliary route of I-5 that runs from near Dunnigan south to I-80 in Vacaville. I-505 is primarily a rural Interstate, but travels through Vacaville and the city of Winters. The highway is the primary route connecting the San Francisco Bay Area and the northern Sacramento Valley, bypassing Sacramento and its attendant city traffic. Thus, it is a major route for travelers heading directly from the San Francisco Bay Area to the Shasta Cascade and the Pacific Northwest.

Power lines connecting Path 15 to Path 66 follow the highway for a while, until one heads northeast and the other northwest.

  1. ^ California Department of Transportation (October 2014). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.