Editing Interstate 505 (section)

{{short description|Interstate Highway in California}}
{{For|the never-built spur in Portland, Oregon|Interstate 505 (Oregon)}}
{{redirect|I-505|the submarine|Japanese submarine I-505}}
{{Use American English|date=April 2025}}
{{Use mdy dates|date=December 2022}}
{{Infobox road
|state=CA
|type=I
|route=505
|section=617
|map={{maplink-road|from=Interstate 505.map}}
|map_custom=yes
|map_notes=I-505 highlighted in red
|length_mi=32.99
|established=1977
|spur_of=5
|spur_type=I
|length_ref=<ref name=bridgelog>{{Caltrans bridgelog|date=October 2014}}</ref>
|direction_a=South
|terminus_a={{jct|state=CA|I|80}} in [[Vacaville, California|Vacaville]]
|junction={{plainlist
|*{{Jct|state=CA|SR|128}} near [[Winters, California|Winters]]
*{{Jct|state=CA|SR|16}} near [[Madison, California|Madison]]
}}
|direction_b=North
|terminus_b={{jct|state=CA|I|5}} near [[Dunnigan, California|Dunnigan]]
|counties=[[Solano County, California|Solano]], [[Yolo County, California|Yolo]]
|previous_type=CA
|previous_route=480
|next_type=I
|next_route=580
}}
'''Interstate&nbsp;505''' ('''I-505''') is a north–south [[List of auxiliary Interstate Highways|auxiliary Interstate Highway]] in the [[Sacramento Valley]] in [[Northern California]]. It is a [[Spur route|spur]] auxiliary route of [[Interstate 5 in California|I-5]] that runs from near [[Dunnigan, California|Dunnigan]] south to [[Interstate 80 in California|I-80]] in [[Vacaville, California|Vacaville]]. I-505 is primarily a rural Interstate, but travels through Vacaville and the city of [[Winters, California|Winters]]. The highway is the primary route connecting the [[San Francisco Bay Area]] and the northern [[Sacramento Valley]], bypassing [[Sacramento, California|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]].

[[Electric power transmission|Power lines]] connecting [[Path 15]] to [[Path 66]] follow the highway for a while, until one heads [[Ordinal direction|northeast]] and the other [[Ordinal directions|northwest]].