Interstate 99 (I-99) is an interstate highway in the United States with two segments: one located in central Pennsylvania and the other in southern New York. The southern terminus of the route is near exit 146 of the Pennsylvania Turnpike (I-70/I-76) north of Bedford, where the road continues south as U.S. Route 220 (US 220). The northern terminus of the Pennsylvania segment is at an at-grade intersection with Musser Lane just before reaching I-80 near Bellefonte. The New York segment follows US 15 from the Pennsylvania–New York border to an interchange with I-86 in Corning. Within Pennsylvania, I-99 passes through Altoona and State College—the latter home to the Pennsylvania State University—and is entirely concurrent with US 220. Long-term plans call for the two segments of I-99 to be connected using portions of I-80, US 220, and US 15 through Pennsylvania.
Interstate 49 (I-49) is a north–south Interstate Highway with multiple segments. The original portion is entirely within Louisiana with an additional signed portion extending from I-220 in Shreveport to the Arkansas state line, three newer sections are in Arkansas, and one section in Missouri. Its southern terminus is in Lafayette, Louisiana, at I-10 while its northern terminus is in Kansas City, Missouri, at I-435 and I-470. Future plans include portions of the remaining roadway in Louisiana, Arkansas, and Texas, to link Kansas City, Missouri with New Orleans.
Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of eight unconnected segments. The longest segment runs from Evansville, Indiana, northeast to the Canadian border in Port Huron, Michigan, and includes the original continuous segment from Indianapolis, Indiana, to Port Huron of 355.8 miles (572.6 km). The remaining separated segments are variously completed and posted or not posted sections of an extension southwest to the Mexican border in Texas. Of this extension—nicknamed the NAFTA Superhighway because it would help trade with Canada and Mexico spurred by the North American Free Trade Agreement (NAFTA)—seven pieces in Laredo, Texas; Pharr, Texas; Brownsville, Texas; Corpus Christi, Texas; Houston, Texas; northwestern Mississippi; and Memphis, Tennessee, have been built or upgraded and signposted as I-69. Indiana completed the fifth segment that extends I-69 through that state in August 2024.
U.S. Route 412 is an east–west United States highway, first commissioned in 1982. U.S. 412 overlaps expressway-grade Cimarron Turnpike from Tulsa west to Interstate 35 and the Cherokee Turnpike from 5 miles (8.0 km) east of Chouteau, Oklahoma, to 8 miles (13 km) west of the Arkansas state line. It runs the entire length of the Oklahoma Panhandle and traverses the Missouri Bootheel.
Interstate 515 (I-515) was a 20.54-mile-long (33.06 km) spur route of I-15 in the US state of Nevada that ran from the junction of I-15, US 93 and US 95 in Downtown approximately 20 miles (32 km) southeast to just north of Railroad Pass in southeastern Henderson. The freeway connected traffic headed from Boulder City and Henderson to Downtown Las Vegas via a direct, high-speed route, and it ran concurrently with, US 93, and US 95 along its entire length.
Route 238, consisting of State Route 238 (SR 238) and Interstate 238 (I-238), is a mostly north–south state and auxiliary Interstate highway in the San Francisco Bay Area of California. The southern segment is signed as SR 238 and is a divided multilane surface highway that runs parallel to the Hayward hills between I-680 in Fremont and I-580 in Castro Valley. The northern segment is signed as I-238 and is a six-lane freeway that runs more east–west between I-580 and I-880 in San Leandro.
State Route 99 (SR 99) is a north–south state highway in the U.S. state of California, stretching almost the entire length of the Central Valley. From its southern end at Interstate 5 (I-5) near Wheeler Ridge to its northern end at SR 36 near Red Bluff, SR 99 goes through the densely populated eastern parts of the valley. Cities served include Bakersfield, Delano, Tulare, Visalia, Fresno, Madera, Merced, Turlock, Modesto, Manteca, Stockton, Sacramento, Yuba City, and Chico.
Interstate 22 (I-22) is a 202.22-mile-long (325.44 km) Interstate Highway in the US states of Mississippi and Alabama, connecting I-269 near Byhalia, Mississippi, to I-65 near Birmingham, Alabama. I-22 is also Corridor X of the Appalachian Development Highway System (ADHS). Designated in 2012, I-22 follows the route of older U.S. Route 78 (US 78) and is concurrent with the route for all but its eastern most 11 miles (18 km). The freeway mainly spans rural areas and passes numerous small towns along its route, including Fulton, Tupelo, New Albany, and Holly Springs in Mississippi and Jasper, Winfield, and Hamilton in Alabama.
Interstate 3 (I-3), the 3rd Infantry Division Highway, is a proposed Interstate Highway in the United States to run from Savannah, Georgia, north to Augusta, Georgia, and Knoxville, Tennessee. The roadway was proposed in the same federal highway measure that gave birth to a proposal for I-14.
The Cimarron Turnpike is a controlled-access toll road in north-central Oklahoma. The route travels 67 miles (108 km), from an interchange with Interstate 35 (I-35) north of Perry, to Westport, just west of Tulsa. The route also consists of a 7.2-mile (11.6 km) spur which runs from the mainline southwest to an interchange with U.S. Route 177 north of Stillwater.
Interstate 14 (I-14), also known as the 14th Amendment Highway, the Gulf Coast Strategic Highway, and the Central Texas Corridor, is an Interstate Highway that is currently located entirely in Central Texas, following US Highway 190 (US 190). The portion of the route that has been constructed and signed to date, the Central Texas Corridor along US 190 west of I-35 was officially designated as I-14 by the Fixing America's Surface Transportation Act, signed by President Barack Obama on December 14, 2015.
Interstate 80 Business, called the Capital City Freeway in its entirety and also known as Business 80, is a business loop of Interstate 80 (I-80) through Sacramento, California, United States. The route is also colloquially referred to as "Cap City Freeway" and "Biz 80". The entire route is a freeway.
The Cherokee Turnpike is a controlled-access toll road in eastern Oklahoma. Opened in 1991, the route is a four-lane freeway carrying US-412 from east of Kansas, Oklahoma, to east of Chouteau, and has a total length of 32.8 miles (52.8 km) and a speed limit of 80 mph (130 km/h).
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. The segment of I-80 in California runs east from San Francisco across the San Francisco–Oakland Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley. I-80 then traverses the Sierra Nevada, cresting at Donner Summit, before crossing into the state of Nevada within the Truckee River Canyon. The speed limit is at most 65 mph (105 km/h) along the entire route instead of the state's maximum of 70 mph (110 km/h) as most of the route is in either urban areas or mountainous terrain. I-80 has portions designated as the Eastshore Freeway and Alan S. Hart Freeway.
Interstate 66 (I-66) is a canceled Interstate Highway designated in the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 as the East–West TransAmerica Corridor and High Priority Corridor 3.
Interstate 69 (I-69) is an Interstate Highway that is in the process of being built in the U.S. state of Texas. It is part of a longer I-69 extension known as the NAFTA superhighway, that, when completed, will connect Canada to Mexico. In Texas, it will connect Tenaha and the Louisiana segment of the route through the eastern part of the state and along the Texas Gulf Coast to Victoria, where it will split into three branches: I-69E to Brownsville, I-69C to Pharr, and I-69W to Laredo. The first segment of I-69 in Texas was opened in 2011 near Corpus Christi. The American Association of State Highway and Transportation Officials (AASHTO) approved an additional 58 miles (93 km) of U.S. Highway 77 (US 77) from Brownsville to the Willacy–Kenedy county line for designation as I-69, which was to be signed as I-69E upon concurrence from the Federal Highway Administration (FHWA). FHWA approval for this segment was announced on May 29, 2013. By March 2015, a 74.9-mile (120.5 km) section of US 59 had been completed and designated as I-69 through Greater Houston. As of 2024, short segments near the southern terminuses of the three branch routes have also all been completed. These branches are planned to be connected to the rest of Interstate 69.
U.S. Highway 412 (US 412) runs east-to-west through northern Arkansas for about 290 miles (470 km). The route begins at the Oklahoma state line near Siloam Springs, and ends at the Missouri state line east of Paragould.
Interstate 87 (I-87) is a partially completed Interstate Highway in the US state of North Carolina, the shortest designated primary Interstate Highway at 12.90 miles (20.76 km) long. The completed portion is in eastern Wake County, between Raleigh and Wendell; the majority of the completed route is known as the Knightdale Bypass, while the remaining three miles (4.8 km) follows the Raleigh Beltline (I-440). It is planned to continue northeast through Rocky Mount, Williamston, and Elizabeth City, ending in Norfolk, Virginia. It is signed as north–south, in keeping with the sign convention for most odd-numbered interstates, but the route goes primarily east–west, with the eastern direction aligning to the north designation. The entire route is concurrent with U.S Highway 64 (US 64), with portions also concurrent with I-440 and US 264.
