Interstate 485 (Charlotte Outer Loop) Interstate 485 Interstate 485 is the beltway that encircles Charlotte, North Carolina. Built in segments and completed in 2015, it functions as a major commuter, freight, and development corridor…
Interstate 5 (I-5) — West Coast’s primary north–south highway Interstate 5 Interstate 5 (I-5) is the principal north–south Interstate on the U.S. West Coast, running roughly 1,381 miles through California, Oregon, and Washington and linking the Mexican an…
Interstate 55: Major north–south corridor from Louisiana to Chicago Interstate 55 Interstate 55 is a principal north–south U.S. Interstate running roughly 964 miles from LaPlace, Louisiana, to Chicago, Illinois, linking Gulf Coast ports and the industrial Midwes…
Interstate 57 (U.S. Interstate Highway) Interstate 57 Interstate 57 is a 386.12-mile north–south Interstate Highway linking Miner, Missouri with Chicago, Illinois. It serves as a regional freight and travel corridor through mostly rur…
Interstate 59 (I-59) — Gulf Coast to Appalachian corridor Interstate 59 Interstate 59 is a 445.23-mile east–northeast Interstate running from Slidell, Louisiana, through Mississippi and Alabama to Wildwood, Georgia, linking Gulf Coast ports with inland…
Interstate 64 (I-64) — U.S. interstate from Missouri to Virginia Interstate 64 Interstate 64 (I-64) is a major east–west U.S. Interstate running roughly 954 miles from Wentzville, Missouri, to Chesapeake, Virginia, connecting the Midwest with the Mid-Atlantic…
Interstate 65: Major north–south corridor from Mobile to Gary Interstate 65 Interstate 65 (I-65) is a principal north–south U.S. Interstate connecting Mobile, Alabama, with Gary, Indiana, running about 887 miles and serving several major cities and regiona…
Interstate 66 (I-66) — Virginia to Washington, D.C. Interstate 66 I-66 is a 76.28-mile east–west Interstate linking Middletown, Virginia, with Washington, D.C., serving rural Shenandoah Valley, suburban Northern Virginia, and the District as a ma…
Interstate 68 (I-68) — Morgantown, WV to Hancock, MD Interstate 68 Interstate 68 (I-68) is a 112.9-mile east–west Interstate in the United States connecting Morgantown, West Virginia, with Hancock, Maryland, traversing the Appalachian highlands an…
Interstate 69 (I-69) Interstate 69 Interstate 69 (I-69) is a north–south U.S. Interstate with a main continuous segment from Indianapolis to Port Huron, Michigan, and several disconnected southern segments planned f…
Interstate 70 (I-70): Major East–West U.S. Interstate Interstate 70 Interstate 70 (I-70) is a primary east–west Interstate running about 2,153 miles from Cove Fort, Utah, to Baltimore, Maryland, crossing ten states and linking mountain, plains, and…
Interstate 71 (I-71) Interstate 71 Interstate 71 is a primary north–south Interstate Highway in the U.S., running about 344 miles from Louisville, Kentucky, through Cincinnati and Columbus to Cleveland, Ohio.
Interstate 72 (I-72) — Hannibal, Missouri to Champaign, Illinois Interstate 72 Interstate 72 (I-72) is an east–west Interstate running roughly 179 miles from Hannibal, Missouri, across the Mississippi River into central Illinois and terminating at Champaign,…
Interstate 73 (North Carolina) Interstate 73 Interstate 73 in North Carolina is a partly completed segment of the I-73 corridor serving the Piedmont Triad, linking Greensboro area highways and planned to form a longer route f…
Interstate 74 Interstate 74 (I-74) is an east–west Interstate Highway in the United States. Its principal segment runs from Davenport, Iowa toward Cincinnati, Ohio; there are separate segments i…
Interstate 75 (I-75) Interstate 75 Interstate 75 is a major north–south U.S. Interstate running from the Miami area to the Canadian border at Sault Ste. Marie, spanning about 1,786 miles and serving many southeaster…
Interstate 76 (Ohio–New Jersey) Interstate 76 is an approximately 434-mile east–west Interstate linking Westfield Center, Ohio, with Bellmawr, New Jersey, running along the Ohio and Pennsylvania Turnpikes and the…
Interstate 76 (western segment): Arvada, Colorado to Big Springs, Nebraska Interstate 76 (west) A concise overview of the western Interstate 76: route, characteristics, history, and its role linking the Denver region with the I‑80 corridor toward Nebraska.
Interstate 77 (I-77) — North–South corridor through the central Appalachians Interstate 77 Interstate 77 is a major north–south Interstate Highway running from Columbia, South Carolina, to Cleveland, Ohio, linking Appalachian regions, metropolitan centers, and freight co…
Interstate 78 (I-78): Pennsylvania to New York City corridor Interstate 78 Interstate 78 (I‑78) is a 143.56‑mile east–west Interstate Highway linking northeastern Pennsylvania, northern New Jersey and Lower Manhattan; a key freight corridor serving New Yo…
Interstate 787 (New York) Interstate 787 Interstate 787 is a short urban Interstate in New York serving Albany and nearby communities; its exact northern terminus is disputed and it continues north as NY 787.
Interstate 79 (I-79): Charleston, West Virginia to Erie, Pennsylvania Interstate 79 Interstate 79 (I-79) is a roughly 343-mile north–south Interstate connecting Charleston, WV, with Erie, PA. It serves western Pennsylvania and West Virginia, parallels US 19, and l…
Interstate 8 (I-8) — Arizona–California east–west highway Interstate 8 Interstate 8 (I-8) is an east–west Interstate Highway about 348 miles long linking I-10 near Casa Grande, Arizona, with San Diego, California, traversing desert basins and mountain…
Interstate 80 (I-80): transcontinental highway across the northern United States Interstate 80 Interstate 80 is a major east–west transcontinental Interstate Highway running from San Francisco, CA to Teaneck, NJ, crossing eleven states and following several historic transcon…
Interstate 81: Appalachian north–south corridor of the eastern United States Interstate 81 Interstate 81 is an approximately 855-mile north–south Interstate running along the Appalachian spine from Dandridge, Tennessee, to Wellesley Island, New York, serving regional cen…
Interstate 82: route, history, and key features of a Pacific Northwest corridor Interstate 82 Interstate 82 is an east–west interstate linking central Washington with northeastern Oregon; this article outlines its route, history, engineering highlights, connections and regi…
Interstate 83 — Baltimore to Harrisburg (I-83) Interstate 83 Interstate 83 (I-83) is an 85-mile Interstate Highway connecting Baltimore, MD, and Harrisburg, PA, serving urban, suburban and regional traffic and largely replacing the former US…
Interstate 84 (United States) Interstate 84 Interstate 84 is the designation for two separate, noncontiguous U.S. Interstate highways—one in the northeastern states and a second in the West—each serving as a major east–west…
Interstate 84 (Oregon–Utah) Major western U.S. Interstate running from Portland, Oregon, to Echo, Utah, linking the Pacific Northwest with the Intermountain West. Routes through Oregon, Idaho, and northern Ut…
Interstate 84 (Pennsylvania–Massachusetts) Eastern segment of Interstate 84, a roughly 232-mile freeway linking northeastern Pennsylvania with western Massachusetts via New York and Connecticut, serving regional commerce an…
Interstate 85: Major Interstate Highway of the U.S. Southeast Interstate 85 Interstate 85 is a primary north–south (signed east–west) Interstate in the Southeastern United States, running roughly between Montgomery, Alabama and Petersburg, Virginia, linkin…
Interstate 86 (Idaho) A short east–west Interstate in southeastern Idaho linking I‑84 near Declo to I‑15 near Chubbuck, serving agricultural regions and the Pocatello area over about 62.85 miles.
Interstate 86 (Pennsylvania–New York) Interstate 86 is an east–west limited‑access highway in two unconnected segments across northwestern Pennsylvania and southern New York, largely formed from upgraded sections of NY…
Interstate 87 (United States) Interstate 87 Interstate 87 is a U.S. Interstate number applied to two separate highways: a long, established route in New York connecting New York City to the Canadian border, and a more recent…
Interstate 87 (New York): Major north–south route from NYC to the Canadian border Interstate 87 (New York) Interstate 87 is a roughly 333-mile north–south highway in New York connecting New York City with the Canada border at Champlain. It includes the Major Deegan, the Thruway and the…
Interstate 88 (Illinois) — Ronald Reagan Memorial Tollway Interstate 88 (Illinois) Interstate 88 is an east–west Interstate in Illinois running about 140.6 miles from Silvis to Hillside. It serves as a major freight and commuter corridor and is officially the Ron…
Interstate 88 (New York) Interstate 88 is an east–west Interstate Highway entirely within New York State that links the Binghamton region with the Capital District over roughly 118 miles.
Interstate 89 Interstate 89 is an Interstate Highway running from Concord, New Hampshire, north through Vermont to Highgate Springs at the Canada border. It connects state capitals and regional…
Interstate 90 (I‑90): Transcontinental U.S. Interstate Interstate 90 Interstate 90 (I‑90) is the northernmost transcontinental Interstate Highway in the United States, running about 3,100 miles from Seattle to Boston and linking thirteen states and…
Interstate 91 — New England north–south corridor Interstate 91 Interstate 91 (I-91) is a north–south highway in New England running from New Haven, Connecticut, to Derby Line, Vermont, near the Canadian border. It follows the Connecticut River…
Interstate 93 (I-93) Interstate 93 Interstate 93 is a north–south Interstate Highway in New England running from Canton, Massachusetts to St. Johnsbury, Vermont, serving Boston, much of New Hampshire, and the White…
Interstate 94 (I‑94) Interstate 94 A major east–west U.S. Interstate from Billings, Montana to Port Huron, Michigan, spanning roughly 1,585 miles across the northern plains and Great Lakes region.
Interstate 95 (I‑95) — Major North–South Corridor on the U.S. East Coast Interstate 95 Interstate 95 (I-95) is the primary north–south Interstate along the eastern United States, running roughly 1,920 miles from Miami, Florida to the Canadian border in Maine, serving…
Interstate 95 in Connecticut Overview of I-95 in Connecticut: route, key features, history and role as the coastal arterial linking major cities from the New York state line to Rhode Island.
Interstate 96 — major east–west freeway across Michigan Interstate 96 Interstate 96 (I-96) is an approximately 192-mile Interstate Highway running east–west entirely in the state of Michigan, linking the Lake Michigan shore near Muskegon with the Det…
Interstate 97 (I-97) — Maryland freeway connecting Annapolis and Baltimore Interstate 97 Interstate 97 (I-97) is a 17.62-mile north–south Interstate Highway in Maryland linking Annapolis to the Baltimore beltway. It is the shortest two-digit Interstate and serves commu…
Interstate 99 (I-99) — Central Pennsylvania freeway Interstate 99 Interstate 99 (I-99) is a north–south Interstate Highway running through central Pennsylvania, linking Bedford and Bellefonte across roughly 85 miles and serving Altoona, State Col…
Interstate H-1 — Oʻahu’s primary east–west freeway Interstate H-1 Interstate H-1 (H-1) is Oʻahu’s main freeway, about 27.2 miles long, linking Kapolei and Kāhala through Honolulu. It is the busiest interstate in Hawaii and is locally known as the…
