Texas state highways

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State Highway (left) and Farm to Market Road (right) shields
State:	State Highway X (SH X)
Interstates:	Interstate Highway X (IH X)
US Routes:	U.S. Highway X (US X)
Notes:	All classes of state-numbered highways are generally state-maintained.

Texas Portal

Texas state highways are a network of highways owned and maintained by the U.S. state of Texas. The Texas Department of Transportation (TxDOT) is the state agency responsible for the day-to-day operations and maintenance of the system. In addition to the nationally-numbered Interstate highways and U.S. highways, the highway system consists of a main network of state highways, loops and spurs that provide local access to the Interstate Highways, U.S. Highways, and state highways. The system also includes a large network of farm to market roads that connect rural areas of the state with urban areas and the rest of the state highway system. The state also owns and maintains some park and recreational roads that are located near and within state and national parks as well as recreational areas. All state highways, regardless of classification, are paved roads.

1 History
2 Types of highways
3 See also
4 References
5 External links

[edit] History

Shield used until the mid-1940s

The Texas State Highway System can trace it roots to the establishment of the Texas Highway Department on April 4, 1917. Administrative control of the department was given to a three member commission that were appointed by the governor for two year terms. In June 21, 1917, the commission held its first public hearing to receive input on potential highway routes. At this time, the committee also divided the state up into six divisions to be headquartered in Amarillo, Dallas, Fort Worth, Houston, San Angelo, and San Antonio.^[1] Later that year, the commission designated 26 state highways covering 8,865 miles (14,267 km) that was to be readily accessible to 89 percent of the state's population.^[2]^[1]

In 1921, Congress amended the Federal Aid to Roads Act of 1916 to require the states to take control of road design, construction and maintenance of state highways by 1925. As a result, on January 1, 1924 the Highway Department took full control of maintaining the state highways from the counties with which they resided. In 1925, the state legislature gives the Highway Department the responsibility of surveying, planning and building highways. The Highway Department was also authorized at this time to acquire new highway right-of-way by purchasing or condemning required land.^[1]

By 1927, the highway system covered 17,960 miles (28,900 km), of which 96 miles (154 km) were concrete, 1,060 miles (1,710 km) were asphalt, 5,000 miles (8,000 km) were gravel, shell or stone and 10,000 miles (20,000 km) were dirt.^[1]

In 1951, a 50-mile (80 km) section of the Gulf Freeway (now Interstate 45) opened, becoming Texas' first urban freeway. In 1957, the state began receiving federal funding for the construction of the Interstate Highway System. The first section of Interstate Highway from county line to county line to open in the state was a 43-mile (69 km) section of I-35 in Bexar County. By 1967, the highway system had 66,000 miles (106,000 km) of highway.^[3]

In 1984, US 66 is replaced by I-40 and the US 66 designation is removed from the state highway system the following year.^[4] ^[5] In 1992, the 3,200 miles (5,100 km) of Interstate Highway System in Texas was completed with the opening of a 6-mile (9.7 km) section of I-27. In 1997, the Texas Turnpike Authority is merged with TxDOT and independently, the North Texas Turnpike Authority becomes responsible for toll projects in Collin, Dallas, Denton and Tarrant counties.^[4]

[edit] Types of highways

[edit] Interstate Highways

A map of all Interstate Highways in Texas

The Interstate Highway System in Texas covers 3,233.4 miles (5,203.7 km) and consists of nine primary routes, six auxiliary routes and the splitting of Interstate 35 (I-35) into two branches, I-35E and I-35W, that provide access to both Fort Worth and Dallas. The Interstate Highway with the longest segment in Texas is I-10 at 878.6 miles (1,414.0 km). The shortest Interstate Highway in the state is I-110 at 0.9 miles (1.4 km).

The construction of the Interstate Highway System in Texas actually began well before these routes were designated as Interstate Highways. A 50-mile (80 km) stretch of the Gulf Freeway (I-45) between Galveston and Houston was opened in 1951, eight years before it was designated I-45. It was also the first urban expressway in Texas. In 1962, 43 miles (69 km) of I-35 opened in Bexar County, the first section of Interstate Highway to open from county line to county line in a large metropolitan area.^[6] Portions of I-10 west of San Antonio took much longer to complete due to the vast open spaces and lack of nearby labor. The majority of the construction of this section of I-10 occurred in the 1970s and 1980s and was complete by the early 1990s. The section east of San Antonio was completed 20 years earlier in 1972.^[7] The opening of a 6-mile (10 km) section of I-27 in 1992 completed the Interstate Highway System in Texas.^[8]

Planning is ongoing for a proposed extension of I-69 southward from its current terminus in Indiana through Texas to the United States-Mexico border.^[9] If built, I-69 will extend about 650 miles (1,050 km) across Texas, from the Louisiana state line in the Texarkana-Shreveport area to South Texas.^[10]

[edit] U.S. Highways

The United States Numbered Highways are a nationwide grid of highways, but unlike the Interstate Highway System, there is no minimum design standard for these highways. This is clearly evident as some stretches of the U.S. Highways in Texas are nothing more than a 2-lane rural road, while others are urban freeways. The U.S. Highways have been replaced for the most part by Interstate Highways for through traffic, the U.S. Highways still serve as important regional connectors. Several notable examples of U.S. Highways that are built to freeway standards include US 75 and US 80 in Dallas, US 59 and US 290 in Houston, and US 90 and US 281 in San Antonio.

The Interstate Highways have replaced several portions of the U.S. Highway network in Texas and as a result, they have been removed from the State Highway System. Several examples include US 81 from Fort Worth to Laredo in favor of I-35, US 75 from Dallas to Galveston in favor of I-45, and US 80 from Dallas to El Paso in favor of I-10 and I-20.^[11]^[12]^[13]

[edit] State highways

SH NASA Road 1 and SH OSR shields

A state highway (SH) is funded and maintained by the state.^[14] State highways have been assigned numbers between 1 and 365 with a few exceptions. There is also a State Highway 495 (renumbered from Farm to Market Road 495), as well as canceled routes SH 550 (a temporary designation for what is now part of Interstate 30) and SH 824 (a temporary designation for what was later part of SH 24). NASA Road 1 and State Highway OSR are also in the State Highway network. The first state highways were designated in 1917. All suffixed routes were eliminated by 1939, though a State Highway 75A existed from 1946 to 1994 to match Oklahoma's State Highway 75A.

[edit] State highway loops and spurs

Loop, spur and beltway shields

State highway loops and spurs are short links in the State Highway network. Typically, a loop connects two state highways, and a spur connects a state highway to a farm to market or local road. Many loops are either new bypasses or older bypassed roads. One loop—around Houston—is labeled Beltway 8. The first loops and spurs were defined in 1939; prior to that, the roadways had been segments of the state highways they branched off of.

[edit] Farm to market roads

Farm to market and ranch to market road shields

Main article: Farm to market road

Farm to market roads generally exist in rural areas. After the city or county acquires right-of-way, TxDOT builds and maintains the road.^[14] A number of these roads, generally west of U.S. Highway 281,^[15] are designated ranch to market roads, and one—Ranch Road 1—is simply a ranch road, serving the LBJ Ranch. Farm to market roads were first designated in 1941 and ranch to market roads in 1942. A number of farm to market roads in urban areas were re-designated in 1995 as urban roads but, amid much controversy, the shields were not changed.

[edit] Business routes

Business Interstate highway, U.S. highway, state highway and farm to market road shields

Business routes are assigned to many old alignments of Interstate highways, U.S. highways, state highways and farm to market roads that have been bypassed. In addition to the numerical designation, a unique lettered suffix is assigned to each business route along the highway - for instance, Business Interstate Highway 40-D and Business Farm to Market Road 1960-A. (Not all routes start from A, and letters are sometimes skipped.) These letters are included on the sign in small print below the number. The sign specifications for business Interstate highways do not include the letter, but it has been added to many signs. Prior to 1991, business routes were assigned loop or spur numbers, but signed as business routes (with a BUSINESS plate above the shield for the main route). In 1991, all the business routes were assigned official designations, and their former loop and spur numbers were eliminated.

[edit] Park and recreational roads

Park road and recreational road shields

Park roads and recreational roads serve state or national parks and "recognized recreational areas"; the first ones were defined in 1939 and 1970 respectively. All roads in state parks are maintained by TxDOT, but are generally not numbered.^[14]

[edit] Toll roads

Main article: Texas Tollways

Toll Interstate highway, U.S. highway and state highway shields

One characteristic of the highways in Texas are its frontage roads; most freeways have continuous frontage roads, one-way in urban areas and two-way in rural areas. Several toll roads have one-way frontage roads—not necessarily continuous—with State Highway numbers. Most toll roads are marked with special logos, but TxDOT has adopted a new shield as of 2006 for numbered toll roads.

Due to lack of funds the state is increasingly relying on toll roads to expand and maintain its aging highway system. This has sparked much controversy as these toll roads will be privately owned and operated and thus will continue to charge tolls long after the respective road has been paid for.

[edit] See also

	Interstate Highways	A list of interstate highways within Texas.
	U.S. Highways	A list of U.S. highways within Texas.
	State highways	A list of all state highways within Texas.
	State highway loops	A list of all state highway loops within Texas.
	State highway spurs	A list of all state highway spurs within Texas.
	Farm to market roads	A list of all farm to market roads within Texas.