Interstate 35

Interstate 35
Public domain · source
Name	Interstate 35
Type	Interstate Highway
Route	35
Length mi	1568
Established	1956
Direction a	South
Terminus a	Laredo, Texas
Direction b	North
Terminus b	Duluth, Minnesota

Interstate 35 is a major north–south United States Interstate corridor extending from Laredo, Texas on the United States–Mexico border to Duluth, Minnesota on the Lake Superior shore. Serving as a backbone for continental freight and passenger movement, it connects numerous metropolitan areas including San Antonio, Texas, Austin, Texas, Waco, Texas, Dallas–Fort Worth, Oklahoma City, Wichita, Kansas, Kansas City, Missouri, Des Moines, Iowa, Minneapolis–Saint Paul, and Duluth. The route integrates with major arteries such as Interstate 10, Interstate 20, Interstate 40, Interstate 70, and Interstate 90 and interfaces with key border facilities like the Laredo bridges and the World Trade International Bridge.

Route description

Starting at the United States–Mexico border in Laredo, Texas, the corridor proceeds through Nuevo Laredo's trade hinterland and northward past San Antonio River infrastructure and the Alamo Plaza vicinity. Through Austin, Texas, the route parallels the Colorado River and traverses the University of Texas at Austin corridor before merging with the Interstate 10 and skirting the Travis County urban footprint. In the Dallas–Fort Worth metroplex, it splits into branches that interact with Dallas Love Field airspace, Fort Worth Stockyards National Historic District, and the Dallas/Fort Worth International Airport transportation network. Continuing into Oklahoma City, the highway crosses the Oklahoma River and connects to the Will Rogers World Airport region. In Wichita, Kansas, it serves the Charles Koch Arena and industrial districts before reaching the Kansas River and entering the Kansas City metropolitan area. Northward, it links Des Moines, Iowa civic institutions and the Iowa State Capitol, then advances through the Minnesota River valley into the Twin Cities where it interfaces with Minneapolis–Saint Paul International Airport and the Mississippi River crossings. The northern terminus approaches Duluth, Minnesota near Canal Park and Port of Duluth–Superior, terminating close to Aerial Lift Bridge and Lake Superior National Estuarine Research Reserve environs.

History

Planning for the corridor occurred alongside the development of the Federal-Aid Highway Act of 1956 and engaged agencies such as the Bureau of Public Roads and state departments including the Texas Department of Transportation, Oklahoma Department of Transportation, Kansas Department of Transportation, Missouri Department of Transportation, Iowa Department of Transportation, and Minnesota Department of Transportation. Construction phases intersected with projects like the Dallas–Fort Worth Turnpike modernization and the urban renewal initiatives in San Antonio and Minneapolis. Notable decades saw expansions concurrent with the growth of NAFTA trade flows and the establishment of border facilities in Laredo; federal legislation such as the Intermodal Surface Transportation Efficiency Act of 1991 influenced capacity and funding. High-profile events affecting the route included major weather impacts like Hurricane Harvey-era freight disruptions, Midwest floods impacting the Missouri River basin, and urban freeway revolts influencing alignments in the Twin Cities and San Antonio River Walk vicinity.

Major intersections

The corridor intersects numerous principal routes and facilities: southern junctions with U.S. 83 near Laredo and connection to Interstate 10 in San Antonio; concurrent segments and interchanges with Interstate 35W and Interstate 35E within the Dallas–Fort Worth metroplex and with Interstate 40 in Oklahoma City-area linkages. Further north, it meets Interstate 70 and Interstate 435 in the Kansas City metropolitan area, Interstate 80 in Des Moines, Iowa, and both Interstate 94 and Interstate 494 in the Minneapolis–Saint Paul region. At its terminus near Duluth, Minnesota, it interfaces with regional routes serving the Port of Duluth–Superior and connects with state highways providing access to Superior, Wisconsin.

Auxiliary routes

The corridor includes a network of auxiliary and split routes serving urban cores, including the Interstate 35W and Interstate 35E splits in Dallas–Fort Worth, the Interstate 35W and Interstate 35E branches in the Minneapolis–Saint Paul area, and beltway or spur connections such as Interstate 135 near Wichita and Interstate 235 through Des Moines. Additional auxiliary designations link to urban loops adjacent to Oklahoma City and San Antonio, interface with U.S. Route 75 in metropolitan Texas, and provide access to airport complexes like Dallas Love Field and Minneapolis–Saint Paul International Airport.

Traffic and usage

The corridor is a primary conduit for international freight linked to Port of Laredo operations, cross-border logistics with Nuevo Laredo, and continental supply chains feeding distribution centers in the Dallas–Fort Worth metroplex and Chicago-oriented corridors via Kansas City. Commuter volumes peak through the Austin and Minneapolis–Saint Paul commuting shed, affecting transit connections to Capital Metro and Metro Transit services. Traffic composition includes long-haul commercial trucks, intercity buses such as Greyhound Lines and regional carriers, and private vehicle flows tied to events at venues like the Alamodome, AT&T Stadium, and Target Field. Congestion points often align with interchange complexes interacting with Interstate 635 and Interstate 35W and with seasonal peaks during agricultural harvests influencing grain and livestock transport.

Future and improvements

Planned improvements span capacity expansions, interchange reconstructions, and resilience projects coordinated among agencies including the Federal Highway Administration and state departments. Projects emphasize freight efficiency tied to U.S. Customs and Border Protection processing modernization at Laredo crossings, congestion mitigation in the Dallas–Fort Worth and Austin metros, and multimodal integration with Amtrak corridors and regional aviation hubs. Environmental and community initiatives reference partnerships with Environmental Protection Agency programs for stormwater and habitat mitigation, along with funding mechanisms under Bipartisan Infrastructure Law allocations. Long-range proposals include targeted autonomous vehicle pilot corridors, express freight lanes, and coordinated smart infrastructure deployments with entities such as the Department of Transportation research arms and metropolitan planning organizations in affected metropolitan areas.

Category:Interstate Highways