Interstate 45

Interstate 45 (I-45) is an interstate highway located entirely within the U.S. state of Texas. While most interstate routes ending in five are cross-country north-south routes, I-45 is comparatively short, never leaving Texas. It connects the cities of Dallas and Houston, continuing southeast from Houston to Galveston over the Galveston Causeway to the Gulf of Mexico.

I-45 replaced US 75 over its entire length, although portions of US 75 remained parallel to I-45 until its elimination south of downtown Dallas in 1987. At the south end of I-45, State Highway 87 (formerly part of US 75) continues into downtown Galveston. The north end is at Interstate 30 in downtown Dallas, where US 75 used the Good-Latimer Expressway. A short continuation, known by traffic reporters as the I-45 overhead, signed as part of US 75, and officially Interstate 345, continues north to the merge with the current end of US 75. Traffic can use Spur 366 to connect to Interstate 35E at the north end of I-345.

List of highways numbered 45

The following highways are numbered 45:

International

Asian Highway 45

European route E45

Burma

Canada

China

G45 Expressway

France

A45 autoroute (proposed)

Germany

Bundesautobahn 45

India

National Highway 45 (India) (Grand Southern Trunk Road)

Iran

Road 45

Japan

Route 45 (Japan)

Korea, South

Jungbu Naeryuk Expressway

National Route 45

Mexico

Mexican Federal Highway 45

New Zealand

New Zealand State Highway 45

United Kingdom

British A45 (Birmingham-Thrapston)

British M45 (Watford Gap-Thurlaston)

United States

Interstate 45

U.S. Route 45

Alabama State Route 45

Arkansas Highway 45

California State Route 45

Colorado State Highway 45

Connecticut Route 45

Florida State Road 45

• Florida State Road 45A

Florida State Road 45A

Georgia State Route 45

Idaho State Highway 45

Illinois Route 45 (former)

Indiana State Road 45

Iowa Highway 45 (former)

Louisiana Highway 45

West Virginia Route 45

West Virginia Route 45 (WV 45) is a state highway in the U.S. state of West Virginia. The state highway runs 25.8 miles (41.5 km) from the Virginia state line near Glengary east to WV 480 and WV 230 in Shepherdstown. WV 45 connects the communities of Glengary and Arden in southwestern Berkeley County with the county seat of Martinsburg. The state highway also connects Shepherdstown in northern Jefferson County with Martinsburg, where the highway meets Interstate 81 (I-81), U.S. Route 11 (US 11), and WV 9.

Route description

WV 45 begins at the Virginia state line in the southwestern corner of Berkeley County. The roadway continues across the state line as SR 681 (Glengary Road) in Frederick County, Virginia. WV 45 heads north and then east through a mix of forest and farmland in a valley east of Sleepy Creek Mountain. East of the village of Glengary, the state highway crosses Back Creek then veers northeast to ascend North Mountain. WV 45 intersects WV 51 (Gerrardstown Road) at Mills Gap at the top of the mountain. WV 45 descends into the Shenandoah Valley, passing the community of Union Corner and the historic homes Campbellton and Ar-Qua Springs. In the village of Arden, WV 45 turns east onto Greenhouse Road, south onto Arden Nollville Road, then northeast from the second road to head toward Martinsburg.

Georgia State Route 45

State Route 45 (SR 45) is a 88.1-mile-long (141.8 km) state highway that runs south-to-north through portions of Seminole, Miller, Early, Calhoun, Terrell, Webster, and Sumter counties in the southwestern part of the U.S. state of Georgia. The route connects Iron City and Plains, via Colquitt and Dawson.

Route description

Interstate 55

Interstate 55 (I-55) is a major Interstate Highway in the central United States. As with most interstates that end in a five, it is a major cross-country, north-south route, connecting the Gulf of Mexico to the Great Lakes. The highway travels from LaPlace, Louisiana, at I-10 to Chicago at U.S. Route 41 (US 41, Lake Shore Drive), at McCormick Place.

The section of I-55 between Chicago and St. Louis was built as an alternate route for US 66. It crosses the Mississippi River twice: once at Memphis, Tennessee, and again at St. Louis, Missouri.

History

When it was realized that a national highway system was needed, the Federal Aid Highway Act of 1956 provided for a highway replacing the old Route 66 which I-55 filled. I-55 was originally constructed in the 1970s, to extend a section of Route 66 between I-294 and Gardner which had been converted into a freeway and had Interstate signage installed in 1960. During the rest of the 1960s, I-55 was built in portions throughout Illinois eventually connecting St. Louis to Chicago where it became the fourth direct route between them. As it goes southwards, most of the Interstate was purpose-built during the 1960s and 70s. The entire length was completed in 1979.

Interstate 35

Interstate 35 (IH-35 or I-35) is a major north–south Interstate Highway in the central United States. I-35 stretches from Laredo, Texas, on the American-Mexican border to Duluth, Minnesota, at Minnesota Highway 61 (London Road) and 26th Avenue East. Many Interstate Highways formerly had splits or spurs indicated with suffixed letters (N/S/E/W), and I-35 was the only one that still had such divisions, before the recent opening of I-69C, I-69E, and I-69W in South Texas. In two stretches, both through twin cities, the highway splits into Interstate 35E—at Dallas and at Saint Paul, Minnesota—and Interstate 35W—at Fort Worth, Texas, and at Minneapolis.

At 1,568 mi (2,523 km), Interstate 35 is the ninth-longest Interstate Highway following Interstate 94, and it is the third-longest north-south Interstate Highway, following Interstate 75 and Interstate 95. Even though the route is generally considered to be a border to border highway, this highway does not directly connect to either international border. I-35's southern terminus is a traffic signal in Laredo, Texas, just short of the Mexican-American border. Travelers going south can take one of two toll bridges across the Rio Grande and the Mexican border, either straight ahead into the Juarez-Lincoln International Bridge, or via Interstate 35 Business through downtown Laredo into the Gateway to the Americas International Bridge.

Interstate 80

Interstate 80 (I-80) is a transcontinental limited-access highway in the United States that runs from downtown San Francisco, California to Teaneck, New Jersey in the New York City Metropolitan Area. The highway was designated in 1956 as one of the original routes of the Interstate Highway system. Its final segment was opened to traffic in 1986. It is the second-longest Interstate Highway in the United States, following Interstate 90. The Interstate runs through many major cities including Oakland, California, Sacramento, California, Salt Lake City, Utah, Omaha, Nebraska, Des Moines, Iowa and Toledo, Ohio, and passes within 10 miles (16 km) of Chicago, Cleveland, Ohio and New York City.

I-80 is the Interstate highway that most closely approximates the route of the historic Lincoln Highway, the first road across America. The highway roughly traces other historically significant travel routes in the Western United States: the Oregon Trail across Wyoming and Nebraska, the California Trail across most of Nevada and California, the first transcontinental airmail route, and except in the Great Salt Lake area, the entire route of the First Transcontinental Railroad. From near Chicago, Illinois east to near Youngstown, Ohio, Interstate 80 is a toll road, containing the majority of both the Indiana Toll Road and the Ohio Turnpike. I-80 runs concurrent with Interstate 90 from near Portage, Indiana to Elyria, Ohio. In Pennsylvania, I-80 is known as the Keystone Shortway, a non-tolled freeway that crosses rural north-central portions of the state on the way to New Jersey and New York City.