Editing Interstate 805 (section)

==Route description==
[[File:I-805 Northbound at CA 905.jpg|thumb|left|I-805 northbound at SR&nbsp;905]]
The route begins at [[Interstate 5 in California|I-5]] near the Mexican border in a far south part of [[San Ysidro, San Diego|San Ysidro]], a neighborhood of [[San Diego]]. As it starts its journey northwards, it quickly has a junction with [[California State Route 905|State Route&nbsp;905]] (SR&nbsp;905) before exiting the city of San Diego and entering [[Chula Vista, California|Chula Vista]].<ref name="gmaps" /> Within the past 20&nbsp;years the freeway has delineated the apparent divide between rich and poor in the city of Chula Vista; those on the eastern side of the freeway have been more affluent and have better schools compared to those on the western side.<ref>{{cite news | title=A City Divided—by Interstate 805—Chula Vista, and Its Schools, Face Serious Threat of East Versus West | work=San Diego Union-Tribune | date=February 7, 2004 | author=Moran, Chris | page=B1|oclc=25257675}}</ref> Just outside the city, I-805 meets [[County Route S17 (California)|County Route&nbsp;S17]] (CR&nbsp;S17), also named Bonita Road, before coming to an interchange with [[California State Route 54|SR&nbsp;54]]. The freeway then enters [[National City, California|National City]], where it intersects Sweetwater Road and Plaza Boulevard, before leaving the city and reentering the city of San Diego.<ref name="gmaps">{{google maps|url=https://maps.google.com/?ll=32.775729,-117.03186&spn=0.587715,1.215363&t=m&z=10|title=I-805|access-date=September 14, 2013}}</ref>

I-805 continues northward through San Diego, where it intersects [[California State Route 94|SR&nbsp;94]], the Martin Luther King Jr. Freeway. As the freeway continues through San Diego, it meets [[California State Route 15|SR&nbsp;15]], the continuation of [[Interstate 15|I-15]]. It then intersects [[El Cajon Boulevard]] before passing under the Hazard Memorial Bridge that carries Adams Avenue.<ref name="gmaps" /> The bridge was named after Roscoe Hazard for his involvement in the construction of several roads and highways in [[Southern California]]. I-805 then travels on the Mission Valley Viaduct, a towering [[reinforced concrete|reinforced]] [[concrete viaduct]] built in 1972, spanning over [[Mission Valley, San Diego|Mission Valley]] and the [[San Diego River]].<ref name="Caltrans">{{CA Named Freeways | pages=98, 101, 252}}</ref> The viaduct is the top stack of the Jack Schrade Interchange over [[Interstate 8|I-8]], which runs along the south side of Mission Valley and crosses underneath the viaduct perpendicularly, and is San Diego County's only symmetrical [[stack interchange]]. The [[San Diego Trolley]] traffic also runs under the viaduct on the valley floor.<ref name="gmaps" />

[[File:Interstate 805-5 Split.jpg|thumb|right|The beginning of I-805 south at I-5 during the evening rush hour]]
After intersecting [[California State Route 163|SR&nbsp;163]], also known as the Cabrillo Freeway, I-805 continues through suburban San Diego, where it meets [[California State Route 52|SR&nbsp;52]] in [[Clairemont, San Diego|Clairemont Mesa]]. North of SR&nbsp;52, it closely parallels I-5 near [[La Jolla]], heading northwest. Passing under the Eastgate Mall arch bridge and entering [[Sorrento Valley, San Diego|Sorrento Valley]], it finally meets its north end at I-5.<ref name="gmaps" /> During the widening project which was completed in 2007, I-5 at the I-805 merge was built to be 21&nbsp;lanes wide.<ref name="newlanes">{{cite news | url=http://www.utsandiego.com/uniontrib/20070328/news_1mi28merge.html | title=Four New Southbound Lanes at I-5/805 Merge Set to Open | work=San Diego Union-Tribune | date=March 28, 2007 | access-date=September 13, 2013 | author=Schmidt, Steve | page=NC1 | oclc=25257675 | url-status=dead | archive-url=https://web.archive.org/web/20131111063936/http://www.utsandiego.com/uniontrib/20070328/news_1mi28merge.html | archive-date=November 11, 2013 | df=mdy-all }}</ref> Eastbound [[California State Route 56|SR&nbsp;56]] and Carmel Mountain Road are accessible via a parallel [[carriageway]] for local traffic heading northbound from I-805; traffic from SR&nbsp;56 westbound can merge onto I-805 from the local bypass.<ref name="gmaps" />

The route is officially known as the Jacob Dekema Freeway after Jacob Dekema, a pioneering force from the [[California Department of Transportation]] (Caltrans) who helped shape the San Diego freeway system.<ref name="Caltrans" /> It is also part of the [[California Freeway and Expressway System]]<ref name="cafes">{{CAFESystem}}</ref> and the [[National Highway System (United States)|National Highway System]],<ref name=fhwa-nhs>{{FHWA NHS map|region=sandiego}}</ref> a network of highways that are considered essential to the country's economy, defense, and mobility by the [[Federal Highway Administration]].<ref name=NHS-FHWA>{{FHWA NHS}}</ref> In 2013, I-805 had an [[annual average daily traffic]] (AADT) of 41,500 at the southern terminus, and 262,000 between Bonita Road and SR&nbsp;54, the latter of which was the highest AADT for the highway.<ref name=traffic>{{Caltrans traffic|year=2013|start=505|end=980}}</ref>