Editing Interstate 805 (section)

{{short description|Interstate highway in California}}
{{Use American English|date=April 2025}}
{{featured article}}
{{Use mdy dates|date=December 2022}}
{{Infobox road
|state=CA
|type=I
|route=805
|section=621
|spur_type=I
|spur_of=5
|map={{maplink-road|from=Interstate 805.map}}
|map_custom=yes
|map_notes=I-805 highlighted in red
|alternate_name=Jacob Dekema Freeway
|length_mi=28.016
|length_ref=<ref name=trucklist>{{Caltrans trucklist}}</ref>
|established=1959<ref name="yr1959" />
|direction_a=South
|counties=[[San Diego County, California|San Diego]]
|terminus_a={{jct|state=CA|I|5}} in [[San Ysidro, San Diego|San Ysidro]]
|junction={{plainlist|
*{{jct|state=CA|SR|905}} in [[Otay Mesa, San Diego|Otay Mesa]]
*{{jct|state=CA|SR|54}} in [[National City, California|National City]]
*{{jct|state=CA|SR|94}} in [[San Diego]]
*{{jct|state=CA|SR|15}} in San Diego
*{{jct|state=CA|I|8}} in [[Mission Valley, San Diego|Mission Valley]]
*{{jct|state=CA|SR|163}} in [[Clairemont, San Diego|Clairemont]]
*{{jct|state=CA|SR|52}} in [[University City, San Diego|University City]]
}}
|direction_b=North
|terminus_b={{jct|state=CA|I|5}} in [[Sorrento Valley, San Diego|Sorrento Valley]]
|previous_type=I
|previous_route=780
|next_type=I
|next_route=880
}}
'''Interstate&nbsp;805''' ('''I-805''') is a major north–south [[List of auxiliary Interstate Highways|auxiliary Interstate Highway]] in [[Southern California]]. It is a [[bypass (road)|bypass]] auxiliary route of [[Interstate 5 in California|I-5]], running roughly through the center of the [[San Diego–Tijuana|Greater San Diego region]] from [[San Ysidro, San Diego|San Ysidro]] (part of the city of [[San Diego]]) near the [[Mexico–United States border|Mexico–U.S. border]] to near [[Del Mar, California|Del Mar]]. The southern terminus of I-805 at I-5 in San Ysidro is less than {{Convert|1|mi|km|abbr=on}} north of the Mexican border. I-805 then traverses the cities of [[Chula Vista, California|Chula Vista]] and [[National City, California|National City]] before reentering San Diego. The freeway passes through the San Diego neighborhoods of [[North Park, San Diego|North Park]], [[Mission Valley, San Diego|Mission Valley]], [[Clairemont, San Diego|Clairemont]], and [[University City, San Diego|University City]] before terminating at I-5 in the [[Sorrento Valley, San Diego|Sorrento Valley]] neighborhood near the Del Mar city limit.

Planning for I-805 began in 1956, and the route was officially designated in 1959 before it was renumbered in the [[1964 state highway renumbering (California)|1964 state highway renumbering]]. Starting in 1967, the freeway was built in phases, with the northern part of the freeway finished before the southern part. I-805 was completed and open to traffic in 1975. Named the '''Jacob Dekema Freeway''' after the longtime head of the regional division of the [[California Department of Transportation]] (Caltrans), I-805 has been frequently cited for its complex engineering and architecture, including near I-8 on the '''Mission Valley Viaduct'''. Since then, several construction projects have taken place, including the construction of carpool lanes.