I‑105

I‑105 is an east–west auxiliary Interstate Highway in California serving the central and southern parts of Los Angeles County. It connects coastal communities near Los Angeles International Airport with inland suburbs and links to primary routes such as I‑405, I‑605, and Interstate 5. The route functions as both a commuter corridor and an airport access route, intersecting major arterial freeways and transit centers that serve Los Angeles, Downtown Los Angeles commuters, and passengers to LAX and regional hubs.

Route description

I‑105 begins near El Segundo at a junction with SR 1 and progresses eastward through Westchester, skirting the northern boundary of Los Angeles International Airport. The highway passes adjacent to transportation nodes including the Aviation/LAX station and interchanges providing connectivity to La Cienega Boulevard, Sepulveda Boulevard, and Crenshaw Boulevard. Mid-route, I‑105 intersects with I‑405 near Inglewood and continues across the Los Angeles River into the Cities of Hawthorne and South Gate. Further east it crosses major corridors including I‑710 and terminates at I‑605 near Norwalk and Downey. The corridor runs parallel to the elevated Metro C Line and the Metro Green Line right-of-way, providing multimodal links to Los Angeles County Metropolitan Transportation Authority bus and rail services.

History

Plans for an east–west controlled-access route across southern Los Angeles County trace back to postwar freeway planning involving agencies such as the California Department of Transportation and the Los Angeles County Metropolitan Transportation Authority. Initially proposed as part of the network expansion influenced by projects like I‑10 and I‑405, the route underwent decades of planning, environmental review, and community negotiation with stakeholders including the City of Los Angeles, City of Inglewood, City of Norwalk, and neighborhood groups from South Los Angeles. Construction commenced in stages during the 1970s and 1980s amid controversy involving eminent domain disputes with property owners, civil rights organizations such as the Congress of Racial Equality, and advocacy from public health groups concerned with air quality in communities adjacent to the airport and industrial zones. The freeway opened to traffic in the early 1990s with coordinated transit investments like the Green Line to mitigate congestion and provide alternatives to automobile travel, reflecting regional priorities advanced by the Southern California Association of Governments.

Major intersections

The route's major interchanges include a western terminus junction near SR 1 and connection points with principal freeways and expressways: the stack interchange with I‑405 serving West Los Angeles, the interchange with I‑110 projections toward San Pedro corridors, crossing with I‑710 near industrial zones serving Port of Long Beach logistics, and the eastern terminus at I‑605 providing access toward Orange County and San Gabriel Valley. Other important junctions include connections to Crenshaw Boulevard, La Cienega Boulevard, Florence Avenue, and arterial links to LAX terminals and air cargo facilities. These intersections integrate I‑105 into a broader network containing US 101 corridors and regional truck routes serving freight movements to and from ports and distribution centers.

Traffic and usage

I‑105 functions as a high-demand commuter and freight-adjacent corridor, with peak period volumes driven by workers commuting to Downtown Los Angeles, El Segundo aerospace and technology employers, and passengers accessing LAX. Traffic mixes include passenger vehicles, transit buses operated by LA Metro and municipal operators, and service vehicles supporting logistics for firms tied to the Port of Los Angeles and Port of Long Beach. Congestion metrics have been influenced by modal shifts following investments in the Green Line and express bus services, monitored by agencies such as the California Air Resources Board and the Federal Highway Administration. Air quality and noise impacts along adjacent communities have prompted mitigation efforts led by entities including the South Coast Air Quality Management District.

Future developments and projects

Planned and proposed projects affecting the corridor include multimodal enhancements coordinated by Los Angeles County Metropolitan Transportation Authority and regional planning bodies like the Southern California Association of Governments. Key proposals involve capacity improvements at interchanges with I‑405 and I‑605, upgrades to transit stations serving the Green Line corridor, and electrification initiatives for buses in partnership with the California Air Resources Board and local transit operators. Freight movement strategies tied to the Port of Los Angeles and Port of Long Beach anticipate investments in goods-movement infrastructure, while community-focused programs championed by the City of Inglewood, City of Hawthorne, and advocacy groups seek additional noise walls, air filtration for schools, and land-use adjustments. Federal funding streams from the U.S. Department of Transportation and state infrastructure grants are expected to influence project timelines and scope, with public engagement processes managed by local jurisdictions and transit agencies.

Category:Interstate Highways in California