Interstate 45

Interstate 45
Route information
Maintained by TxDOT
Length:	284.913 mi[1] (458.52 km)
Existed:	1971 – present
Major junctions
South end:	SH 87 in Galveston
	I-10 in Houston I-20 in Dallas
North end:	I-30 / US 75 in Dallas
Highway system
Main route of the Interstate Highway System Main • Auxiliary • Business Highways in Texas Interstate • U.S. • TX (Loops – Spurs – Rec – FM) ← SH 44 SH 45 → ← SH 344 SH 345 →

Interstate 45 (I-45) is an intrastate Interstate Highway located entirely within the U.S. state of Texas. It connects the cities of Dallas and Houston, continuing southeast from Houston to Galveston over the Galveston Causeway to the Gulf of Mexico. Interstate 45 is the only intrastate Interstate Highway ending in 5 or 0.

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,^[2] 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.

The portion of I-45 between downtown Houston and Galveston is known to Houston residents as the Gulf Freeway. The short elevated section of I-45 near downtown Houston is known as the Pierce Elevated, after the surface street next to which the freeway runs, while north of Interstate 10 it is known as the North Freeway. I-45 and I-345 in the Dallas area, north of the interchanges with Interstate 20 and State Highway 310 (old US 75), is the Julius Schepps Freeway. The Gulf Freeway and North Freeway both include reversible high-occupancy vehicle lanes for buses and other high-occupancy vehicles to and from downtown Houston.

Route description

In addition to the official control cities of Galveston, Houston, and Dallas,^[3] I-45 serves a number of other communities, including La Marque, League City, Spring, The Woodlands, Conroe, Willis, Huntsville, Madisonville, Centerville, Buffalo, Fairfield, Corsicana, and Ennis.

U.S. Highway 190 joins I-45 for 26 miles (42 km) from Huntsville, Texas to Madisonville, Texas. U.S. Highway 287 joins I-45 for 18 miles (29 km) from Corsicana, Texas to Ennis, Texas. US 287 signs are only posted (with I-45) from the northern end of Business Loop 45 in Corsicana to the Ellis County line.

Hurricane Rita evacuation from the Louetta Road (exit 68) overpass

Interstate 45 gained notoriety during Hurricane Rita in 2005. Thousands of Houston area evacuees jammed the roadway trying to leave. As a result, the freeway became a parking lot. Gas stations ran dry and hundreds of people's cars simply ran empty, their occupants having to spend the night along the shoulder. Four-hour drives suddenly became 24-hour drives. Even though the Texas Department of Transportation started contraflow lane reversal at FM 1488, it did not alleviate the traffic jam deep into the city, as that starting point was even north of The Woodlands, which is close to Conroe, the northern terminus of the greater Houston area.

At just 284.913 miles (458.523 km), I-45 is the shortest of the primary interstates (those ending in 0 or 5).

Gulf Freeway

The stretch of I-45 connecting Galveston with Houston is known as the Gulf Freeway. It was the first freeway built in Texas--opened in stages beginning on October 1, 1948, up to a full completion to Galveston in 1952, as part of U.S. Highway 75. At the north (Houston) end, it connects to the North Freeway via the short Pierce Elevated, completed in 1967.^[4] The section north of the curve near Monroe Road/State Highway 3 in southeastern Houston was built on the right-of-way of the former Galveston-Houston Electric Railway, which entered downtown on Pierce Street.^[5][6]

After several interchanges, I-45 crosses the Galveston Causeway and passes Tiki Island. The split with State Highway 6 and State Highway 146 (to State Highway 3) may be the beginning of the Gulf Freeway^{[citation needed]}; old U.S. Highway 75 south of this junction was upgraded on the spot.^[7]

The Gulf Freeway generally parallels State Highway 3 (old US 75) about 1 mile (1.5 km) to the west, bypassing La Marque, Dickinson and South Houston. It includes interchanges with several other freeways: the Emmett F. Lowry Expressway (Farm to Market Road 1764), NASA Road 1 Bypass and the Sam Houston Tollway, meeting the north end of State Highway 3 in southeastern Houston. (This part of SH 3 — on Winkler Drive and Monroe Road — is not part of old US 75.) A center reversible HOV lane begins just south of the Sam Houston Tollway.

I-45 and I-10 next to Downtown Houston

In Houston, I-45 meets Interstate Highway 610 and State Highway 35 at a complicated interchange.^[8] At the merge with Spur 5, a short freeway spur to the University of Houston, elevated collector/distributor roads (also part of Spur 5) begin. The C/D roads and the HOV lane end at Dowling Street, the original end of the Gulf Freeway. Just past Dowling Street is an interchange with U.S. Highway 59 (Eastex Freeway and Southwest Freeway) and State Highway 288 (South Freeway), after which I-45 technically becomes the North Freeway^[9] as it runs along the northwest half of the block between Pierce Street and Gray Street as the Pierce Elevated.

The reversible high-occupancy vehicle lane begins in downtown Houston at the intersection of St. Joseph Parkway and Dowling Street, with easy access inbound to St. Joseph Parkway and outbound from Pierce Street. It runs down the median of the Gulf Freeway, mostly at the same level as the main lanes. Ramps are provided for access to and from the following roads:

• Eastwood Transit Center — full access
• Interstate Highway 610 north frontage road — full access
• Monroe Road and Monroe Park & Ride — full access
• Fuqua Park & Ride and South Point Park & Ride — full access
• Frontage roads north of Dixie Farm Road (Farm to Market Road 1959) - towards downtown, with a ramp stub for continuation

North Freeway

Contraflow lane reversal for evacuation of Hurricane Rita in 2005 along I-45 in The Woodlands, north of Houston.

The North Freeway HOV begins in downtown Houston near the University of Houston–Downtown, with easy access inbound on Milam Street and outbound on Travis Street. Ramps and entrances are provided for access from the following roads:

• Interstate Highway 10 westbound exit and entrance only — full access
• Quitman Street — full access
• Airline Drive (to Crosstimbers Road) - full access
• N. Shepherd (to N. Shepherd Park & Ride) - full access
• Farm to Market Road 525 (Aldine-Bender Rd) - full access
• Kuykendahl Park & Ride — full access
• Farm to Market Road 1960 (to Spring Park & Ride) - full access

The HOV ends approximately one mile north of the Cypress Creek Parkway (FM1960) exit.

Schepps Freeway

The stretch of I-45 along the Julius Schepps Freeway in Dallas, from the Trinity River to Downtown Dallas, is elevated above the surrounding areas for most of its length. As such, when ice storms hit the Dallas area (usually on average 1-2 times per year), the freeway is shut down, and traffic is diverted to State Highway 310 and U.S. Highway 175 which parallel I-45.

I-345 is just 1.4 miles^[10] (2.3 km) long and connects the end of I-45 to the end of US 75 along the east side of downtown Dallas. It is signed northbound as US 75 and southbound as I-45.

Lane configuration

From south to north, the following are one-way lane counts are for mainlanes only:

• 3 lanes between Galveston and FM 1959
• 4 lanes between FM 1959 and US 59
• 3 lanes between US 59 and McKinney Street
• 4 lanes between McKinney Street and Beltway 8
• 5 lanes between Beltway 8 and Parramatta Lane
• 4 lanes between Parramatta Lane and Spring Crossing Drive
• 5 lanes between Spring Crossing Drive and Lake Woodlands Drive
• 4 lanes between Lake Woodlands Drive and S Loop 336 (exit 84)
• 3 lanes between S Loop 336 and FM 3083 (exit 90)
• 2 lanes between FM 3083 (exit 90) and exit 243
• 3 lanes between exit 243 and I-20
• 5 lanes between I-20 and I-30
• 4 lanes between I-30 and the beginning of the Central Expressway/US 75

History

In the initial assignment of state highways in 1917, Dallas-Fort Worth and Houston were connected by a branch of State Highway 2 (the Meridian Highway), which ran via Waco and Bryan and continued on to Galveston. The more direct route followed by I-45 was not initially part of the system between Richland and Huntsville;^[11][12] this cutoff was added by 1919 as State Highway 32,^[13] and U.S. Highway 75 was assigned to the alignment in 1926.^[14] Prior to the coming of the Interstate Highway System in the late 1950s, the only improvements to US 75 in Texas beyond building a two-lane paved roadway were in the Houston and Dallas areas.^[15] However, the highways in and near these cities included some of the first freeways in the state: the Gulf Freeway (Houston) and the Central Expressway (Dallas).

Gulf Freeway (Houston to Galveston)

The Galveston-Houston Electric Railway began operating an interurban between those cities on December 5, 1911, and last ran on October 31, 1936, though the Houston Electric Company, operator of Houston's city transit system, continued to run trains on the portion between downtown and Park Place. A proposal for a "super-highway" between the cities was first made in 1930, and Houston Mayor Oscar Holcombe began to work towards it later that decade. He announced an agreement with the Houston Electric Company on April 12, 1940, through which the company could convert its four remaining lines to buses, in exchange for the right-of-way used by the Park Place line. This line was last used on June 9, 1940, the last day of streetcar service in Houston;^[16] the replacement is still operated by METRO as the 40 along Telephone Road.

Before the new highway was built, U.S. Highway 75 followed Galveston Road (now mostly State Highway 3), Broadway Street, and Harrisburg Boulevard into downtown Houston. State Highway 225 carried traffic from La Porte along La Porte Road to US 75 in Harrisburg, and State Highway 35 connected Alvin with downtown Houston along Telephone Road and Leeland Street.^[17] Plans made in October 1943, when the Texas Transportation Commission signed an agreement with Houston and Harris County, referred to the new bypass as a relocation of US 75. Drawings were released by the state on January 31, 1946, and included almost continuous frontage roads, broken only at railroad crossings.^[16] Although the freeway ended at Live Oak Street, a so-called "four-street distribution system"^[18] of four one-way streets, timed for 30 miles per hour (50 km/h), carried traffic to Main Street.^[19] Initially, the two southwestern streets — Pierce Street and Calhoun Avenue (now St. Joseph Parkway) - carried traffic towards the freeway, and the other two — Jefferson and Pease Streets — carried exiting traffic;^[20] once the freeway was completed far enough to allow US 75 to be marked along it, Pease and Pierce Streets carried that highway to Fannin Street.^[21]

The first freeway dedication in the state took place at 7 p.m. on September 30, 1948, at the overpass over Calhoun Road by the University of Houston. The roadway between downtown and Telephone Road was opened to traffic after speeches, but lacked an official name, being called the "Interurban Expressway", after the rail line that it replaced, by the press. Mayor Holcombe quickly started a contest to assign a name, and the city chose the winning entry on December 17, 1948. Sara Yancy of Houston Heights won $100 for her submission of "Gulf Freeway", named for the Gulf of Mexico that the highway would reach when completed. The freeway was extended to Griggs Road in February 1951, Reveille Street (onto which SH 35 was realigned) in July 1951, and was completed to the Galveston Causeway on August 2, 1952, with a ceremony on the bridge over Farm to Market Road 517 near Dickinson. However, beyond Reveille Street, the road was not built to freeway standards, with 32 at-grade intersections, though no traffic signals. The highway curved away from the old interurban right-of-way near Monroe Road, about where the Park Place streetcar line had ended. In December 1952, a short spur, now part of Interstate 610, was opened to connect with SH 225.^[22] A three-way split in the northwest part of Park Place, near where Gulfgate Shopping Center opened in 1956, carried non-stop traffic to and from SH 35 and SH 225.^[16][23][24] This split was also the location of a lane drop; the roadway carried six lanes (three in each direction) between Houston and the interchange, and four beyond to Galveston. After the new US 75 was completed, the old road between downtown and South Houston was dropped from the state highway system, while the remainder became State Highway 3, connecting to the Gulf Freeway via Winkler Drive, effective August 20, 1952.^[25]

The first major change was made in preparation for the North Freeway connection, when the directions of Calhoun Avenue and Jefferson Street were swapped so that they would alternate. A bridge, dated 1954, was built to carry traffic from Jefferson Street over traffic to Jefferson Street,^[24] and US 75 was moved to Calhoun Avenue northbound,^[26] soon crossing downtown on the one-way pair of Calhoun Avenue and Pierce Street to the new North Freeway.^[27] A median barrier was added in 1956 to prevent crossover accidents. Southeast of downtown Houston, the at-grade intersections proved dangerous, and only two had been replaced with interchanges by 1959, when the Texas Highway Department began a program to upgrade the road to full freeway standards. Frontage roads would be required along the entire highway, since the state had not purchased access rights, and so abutting property owners were able to build driveways to the road. To accomplish this, traffic was shifted to the newly-built frontage roads so that the central main lanes could be reconstructed. This grade separation was completed from Houston to Almeda-Genoa Road (exit 34) in June 1959, Farm to Market Road 1959 (exit 30) in October 1964, Farm to Market Road 518 (exit 23) in December 1970, and Farm to Market Road 1764 (exit 15) in 1976. As the section beyond FM 1764 into Galveston had already been rebuilt,^[24][28] this marked the completion of the Gulf Freeway as an actual freeway.^[16]

Looking northwest along the Gulf Freeway towards downtown; the Spur 5 distributor lanes, completed in 1988, are to the right

As the first freeway in Texas, the standards of the Gulf Freeway soon became inadequate, with poor sight lines and little room to merge when entering. It also attracted development, such as Gulfgate Shopping City, the first mall in the Houston area, the Manned Spacecraft Center, and many residential developments. Heavy congestion began to affect the freeway by the early 1960s; two roughly parallel freeways — the Harrisburg Freeway and Alvin Freeway - were proposed at that time to relieve the traffic, but were not built. A short project to widen the road to six lanes between I-610 and Sims Bayou was completed in 1960, and ramp meters were installed in 1966. The I-610 interchange was rebuilt with direct connections for most movements in 1975. Plans to reconstruct the freeway near downtown began in 1972, taking about 170 houses and 22 businesses from the southwest side for the room to expand the main lanes and add parallel lanes for the Alvin Freeway. Local opposition was unsuccessful at stopping the project, and construction on this segment, and others to the southeast, took place in the 1980s. The lanes were shifted outward to make room for the transitway, which opened to I-610 on May 16, 1988. These lanes were inspired by the similar ones on the Shirley Highway in the Washington Metropolitan Area.^[29] That year also marked the end of the reconstruction inside I-610, along with the elevated distribution lanes alongside the main lanes near downtown; the first short piece of the Alvin Freeway was finally connected to these in 1999. This project gave I-45 its current configuration, mostly eight main lanes wide, from Sims Bayou past I-610 to Griggs Road in 1981, to Telephone Road in 1982, to Lockwood Drive in 1985, and finally to downtown in 1988.^[16]

However, this was not the end of construction on the Gulf Freeway. The highway beyond I-610 to FM 1959, which had just been upgraded in the 1950s and 1960s, saw an extension of the transitway to a temporary end near FM 1959, widening to eight lanes, and a large stack interchange at the Sam Houston Tollway. This reconstruction was completed between Almeda-Genoa Road and College Avenue in 1991, between College Avenue and Sims Bayou in 1994, and finally, in 1997, there was no construction anywhere on the entire length of the freeway when the tollway interchange was opened, along with the widening between Almeda-Genoa Road and FM 1959. A 1999 study recommended widening the entire stretch from the Sam Houston Tollway to Galveston to at least eight lanes. Construction to replace the Galveston Causeway began in mid-2003,^[16] and work on a section through Webster, including a new interchange with the NASA Road 1 Bypass, began in mid-2007.^[30]

Widening of the freeway between Kurland Drive and Clear Lake City Boulevard began in July 2011. This construction will expand the number of freeway lanes from six to ten, and increase the number of frontage lanes from four to six. It will also involve rebuilding the overpasses at Dixie Farm Road and Clear Lake City Boulevard.^[31] The project is expected to take four years to complete.^[32] According to the Texas Department of Transportation, the project is approximately five miles in length, starting at Kurland and ending approximately one mile south of Clear Lake City Boulevard.

The project has four phases. Phase one is the reconstruction of the main lanes from the northern end of the project to just south of FM 1959. The end of this phase will include the demolition and reconstruction of the bridge at the FM 1959 intersection. Phase two, planned to begin in the summer of 2012, will be the reconstruction of the frontage roads from just south of FM 1959 to the southern end of the project. Phase three will be the reconstruction of the main lanes on the southern half of the project, and is planned to begin in the summer of 2013. Phase four, scheduled to start in fall 2014, will be the demolition and reconstruction of the overpass at Clear Lake City Boulevard.

North Freeway (Houston to Conroe)

Southbound on the North Freeway

The last alignment of US 75 before the North Freeway was built left downtown Houston to the northwest on Main Street, turning north at Airline Drive, and then northwest along the present alignment of I-45, then known as Stuebner Airline Road, Shepherd Drive, and East Montgomery Road.^[26] The freeway replacement was authorized in stages between May 1945 and June 1952, when the Texas Transportation Commission adopted plans for a freeway all the way between Houston and Dallas. The North Freeway name was adopted in 1956; an unsuccessful proposal in 1965 would have renamed it the Dallas Freeway.^[33] The first short piece of the freeway to open crossed Buffalo Bayou, connecting the two one-way pairs from the north end of the Gulf Freeway with the south end of Houston Avenue. This was opened on December 12, 1955, and allowed US 75 to bypass its run on Main Street;^[27] it included interchanges with Allen Parkway and Memorial Drive. The next piece near downtown opened on July 24, 1962, leaving the 1955 freeway in the Allen Parkway interchange, passing east of Houston Avenue, and connected to an already-built portion at I-610. The six-lane Pierce Elevated, which occupies half a block on the southwest side of Pierce Street, required the acquisition of a number of commercial properties; the cost prevented the full block from being used. This portion opened on August 18, 1967, connecting the Gulf and North Freeways and bypassing the "four-street distribution system", which remains in its original form to this day.^[16][34]

The first piece of the North Freeway to be built outside I-610 was an upgrade of existing US 75 on Stuebner Airline Road, between Airline Drive and Shepherd Drive, opened in December 1959. In April 1961, this was completed to the interchange with I-610, and on July 24, 1962 the downtown section was extended north to meet it. As each section opened, US 75 was moved to it, temporarily using I-610 to Airline Drive for about a year.^[35] At the other end, US 75 was upgraded from Spring Creek at the north edge of Spring north to the San Jacinto River south of Conroe in 1960.^[36] In between, the upgrade was completed from Farm to Market Road 525 to near Richey Road in December 1961, south to the 1959 segment in February 1963, and north to the 1960 segment in March 1963, completing the North Freeway except for the Pierce Elevated (1967). The freeway as initially built had eight lanes (four in each direction) between downtown and I-610, six to Farm to Market Road 1960, and four north of FM 1960.^[16]

Like the Gulf Freeway, the North Freeway soon became congested. The oil boom of the 1970s resulted in large-scale residential development along the highway, most notably The Woodlands. Since the corridor was strongly directional, with 65% of peak-hour traffic going in the peak direction, a 9.6-mile (15.4 km) contraflow lane for buses and other high-occupancy vehicles (HOV) was implemented later that decade, opening on August 28, 1979 between downtown and Shepherd Drive (exit 56B). The facility, operating during both rush hour periods, occupied the leftmost lane of the other direction, and was separated from the other lanes with a movable pylon every 40 feet (12 m). In 1980, the existing center breakdown lanes were restriped for HOV traffic for about two miles (3 km) from the north end of the contraflow lane. However, off-peak traffic was increasing, and construction began in 1983 on a more permanent reversible transitway in the median. This, the second transitway in Houston (a month after the one on the Katy Freeway), opened on November 23, 1984, replacing the contraflow lane.^[16][29]

Reconstruction of the main lanes and frontage roads to handle increased traffic began in 1982 just north of downtown. No lanes were added south of I-610, but the eight-lane cross section, with room for a transitway, was continued north as construction progressed. Work was completed south of Airline Drive (exit 53) in about 1985, to Shepherd Drive (exit 56B) in 1987, and to Farm to Market Road 525 (exit 60A) in 1990; this last opening allowed the transitway to extend to just south of FM 525. The Hardy Toll Road, completed on June 28, 1988 between I-610 and I-45 near The Woodlands, added capacity to that part of the corridor, and in 1990 reconstruction was completed on a short piece of I-45 from the toll road into The Woodlands. Reconstruction continued from FM 525, reaching Airtex Boulevard (exit 63) in 1997, including part of the Sam Houston Tollway interchange (completed in 2003) and a transitway extension, Cypresswood Drive (exit 68) in 1998, extending the transit way to its present terminus, and the Hardy Toll Road (exit 72) in 2003. Work on the section through The Woodlands to Research Forest Drive (exit 77) was completed in 2001, including a direct connection to Woodlands Parkway, and in 2003 work was completed to Farm to Market Road 1488 (exit 81).^[16] Construction is complete between FM 1488 and FM 3083 (Exit 90). Two more projects will extend eight lanes to Farm to Market Road 830 (exit 92), and another will take six lanes to the county line south of New Waverly, near State Highway 75 (exit 98).^[37]

Between Conroe and Richland

The first part of I-45 between Conroe and Richland was the bypass around Huntsville.^[36]

The final piece of I-45 between the cities opened on October 13, 1971, for 12 miles (19 km) between Fairfield and Streetman.^[38]

Richland to Julius Schepps Freeway (Dallas)

The Central Expressway was the first freeway in Dallas, built as a new alignment of US 75. It first opened between San Jacinto Street and Fitzhugh Avenue in 1949, and soon stretched south to Hutchins. However, the stretch through downtown ran along the surface, as did the part south of the bridge over the Trinity River, due to diversion of funds to the north portion.^[39] By the late 1950s, a bypass to the east of the downtown section was planned.^[40] By the time construction reached Hutchins, in about 1955, the state decided to build further segments to full freeway standards. By 1961, the freeway was complete between Hutchins and the State Highway 14 split at Richland, except for the bypass around Corsicana, which was built ca. 1964.^[24][36] This freeway was mostly built along the existing US 75; one of the projects in Navarro County, near Corsicana, was the first Interstate project in Texas approved under the Federal-Aid Highway Act of 1956.^[38]

1955 "Yellow Book" plan for Interstates in Dallas

It was not until 1964 that I-345, extending I-45 north along the proposed Central Expressway bypass, was added as a proposed state highway.^[10] I-45 and I-345 were built and opened in the 1970s, with the final section, between Lamar Street (exit 283A) and the Central Expressway (exit 283B),^[24] opening on February 25, 1976.^[41] At the north end, before it merged into the Central Expressway (which continued to carry US 75), I-345 straddled the bridges over Bryan Street and Ross Avenue, the latter the location of the opening ceremonies in 1949.^[42] Because of their location, these two bridges were not replaced in the 1990s reconstruction of the North Central Expressway, and are the only surviving grade separations from the initial construction north from downtown.^[24]

At the time the interchange with I-20 was built, the freeway that crossed I-45 was then a part of I-635; it would not be until later when, initially, I-20 was added to I-635 as a multiplex, then later still, I-635 would be truncated away from the I-45 interchange (back around to just north of what is now I-20's interchange with US 175).^[43][44]

Reconstruction and widening to six lanes, from the Ellis-Navarro county line (between exits 243 and 244) north to State Highway 310 (exit 275), began in 1991.^[45] The last section, near the north end, was completed in 2002.^{[citation needed]}

Exit list

County	Location	#	Destinations	Notes
Galveston	Galveston		SH 87 – Downtown Galveston, East Beach, Port Bolivar	Southbound exit and northbound entrance
		1A	Spur 342 (61st Street) / 71st Street – Scholes International Airport, West Beach, Moody Gardens, Schlitterbahn Galveston Island
		1B	71st Street	Southbound exit and northbound entrance
		1C	FM 188 (Teichman Road) / SH 275 (Harborside Drive)
		4	Village of Tiki Island
		5	Frontage Road
	Bayou Vista	6	Frontage Road	Southbound exit only
		7A	SH 3 north / SH 146 north – Texas City, La Marque	Northbound exit and southbound entrance
		7B	SH 6 west – Bayou Vista, Hitchcock	Northbound exit and southbound entrance
		7C	Frontage Road	Northbound exit and southbound entrance
		7	SH 6 / SH 146 – Texas City	Southbound exit and northbound entrance
	La Marque	8	Frontage Road	Northbound exit and southbound entrance
		9	Frontage Road	Southbound exit and northbound entrance
		10	FM 519 (Main Street)
		11	Vauthier Road
	Texas City	12	FM 1765 – La Marque, Texas City
		13	Century Boulevard, Delany Road
		15	FM 1764 / FM 2004 (Mall of the Mainland Parkway) – Hitchcock
		16	FM 1764 east (Emmett F. Lowry Expressway) – Texas City	Southbound exit and northbound entrance
		17	Holland Road, Hughes Road
	Dickinson	19	FM 517 / Hughes Road – Dickinson, Alvin
	League City	20	FM 646 – Santa Fe
		22	SH 96 / League City Parkway
		23	FM 518 – League City
Harris	Webster	24	NASA 1 (NASA Bypass) – Johnson Space Center	Southbound exit and northbound entrance
		25	FM 528 / NASA 1 – Alvin, Johnson Space Center
		26	Bay Area Boulevard – University of Houston–Clear Lake
		27	El Dorado Boulevard
	Houston	29	FM 2351 (Clear Lake City Boulevard) – Friendswood
		30	FM 1959 (Dixie Farm Road) – Ellington Field
		31	Beltway 8 (Frontage Road) / FM 2553 (Scarsdale Boulevard)	Northbound exit and southbound entrance
		32	Sam Houston Tollway
		33	Beltway 8 (Frontage Road) / Fuqua Street	Southbound exit and northbound entrance
		34	Almeda-Genoa Road, South Shaver Road
		35	Clearwood Drive, Edgebrook Drive
		36	Airport Boulevard, College Avenue
		38	SH 3 (Monroe Road) / Bellfort Avenue
		38B	Howard Drive, Bellfort Avenue	Southbound exit and northbound entrance
		39	Park Place Boulevard, Broadway Boulevard
		40A	Frontage Road	Northbound exit only
		40B	I-610 east (South Loop Freeway) to SH 225 – Pasadena	Northbound exit and southbound entrance
		40B	I-610 (South Loop Freeway) / SH 35 south to SH 225 – Pearland, Alvin, Pasadena	Southbound exit and northbound entrance
		40C	I-610 west (South Loop Freeway)	Northbound exit and southbound entrance
		41A	Woodridge Drive
		41B	Griggs Road, Broad Street
		42	US 90 Alt. (South Wayside Drive)	Northbound exit is via exit 41B
		43A	Telephone Road
		43B	Tellepsen Street	Northbound exit and southbound entrance
		44A	Elgin Street, Lockwood Drive, Cullen Boulevard – University of Houston	Northbound exit and southbound entrance
		44B	Spur 5 south – University of Houston	Southbound exit and northbound entrance
		44C	Cullen Boulevard – University of Houston	Southbound exit and northbound entrance
		45	Scott Street – Downtown Houston	Signed as exit 45A southbound
		46	US 59 (Southwest Freeway, Eastex Freeway) / SH 288 south (South Freeway) – Cleveland, Lake Jackson, Freeport, Victoria	Signed as exits 46A (north) and 46B (south)
		47A	Allen Parkway
		47B	Houston Avenue, Memorial Drive	Northbound exit and southbound entrance
		47C	McKinney Street	Southbound exit and northbound entrance
		47D	Dallas Street, Pierce Street	Southbound exit and northbound entrance
		48	I-10 (East Freeway, Katy Freeway) / US 90 – Beaumont, San Antonio	Signed as exits 48A (east) and 48B (west)
		49A	Quitman Street	Southbound exit and northbound entrance
		49B	North Main Street, Houston Avenue
		50A	Patton Street	Southbound exit is via exit 50
		50B	Cavalcade Street, Link Road	Signed as exit 50 southbound
		51	I-610 (North Loop Freeway)
		52A	Frontage Road	Southbound exit only
		52B	Crosstimbers Road
		53	Airline Drive
		54	Tidwell Road
		55A	Parker Road, Yale Street
		55B	Little York Road	Northbound exit and southbound entrance
		56A	Canino Road	Northbound exit and southbound entrance
		56B	Spur 261 (North Shepherd Drive) / Little York Road	Southbound exit and northbound entrance
		57A	Gulf Bank Road
		57B	SH 249 (West Mount Houston Road) – Tomball
		59	West Road
		60A	FM 525 (Aldine Bender Road) / Fallbrook Road
		60B	Beltway 8 (Frontage Road)	Southbound exit is via exit 60A
		60B	Beltway 8 east / Sam Houston Tollway west – Bush Intercontinental Airport	Signed as exits 60C (west) and 60D (east) northbound
		61	Greens Road
		62	Kuykendahl Road, Rankin Road, Ryan Drive
		63	Airtex Drive
		64	Richey Road
		66A	FM 1960 – Addicks, Humble	Signed as exit 66 southbound
		66B	Hollow Tree Street, Parramatta Lane	Northbound exit and southbound entrance
		68	Cypresswood Drive, Holzwarth Road, Louetta Road
		70A	FM 2920 – Tomball
		70B	Spring Stuebner Road
		72B	Hardy Toll Road south	Signed as exit 72 northbound
		72A	Spring Crossing Drive	Southbound exit and northbound entrance
Montgomery		73	Rayford Road, Sawdust Road
	The Woodlands	76	Robinson Road, Woodlands Parkway	Signed as exits 76A (Robinson Road) and 76B (Woodlands Parkway) northbound
		77	Lake Woodlands Drive, Research Forest Drive, Tamina Road
		79	SH 242 (College Park Drive, Needham Road, Lone Star College–Montgomery, Lone Star College–University Center)
	Conroe	81	FM 1488 – Magnolia, Hempstead
		83	Crighton Road, Camp Strake Road, River Plantation Drive
		84	SH 75 north (Frazier Street) / Loop 336
		85	FM 2854 / Gladstell Street
		87	SH 105 / FM 2854 – Conroe – Lake Conroe
		88	Loop 336 – Navasota, Cleveland
		90	FM 3083 (Teas Nursery Road)
		91	League Line Road
		92	FM 830 (Seven Coves Drive)
	Willis	94	FM 1097 – Willis – Lake Conroe
		95	Longstreet Road	Northbound exit and southbound entrance
		98	SH 75 / Shepard Hill Road, Danville Road
Walker		102	SH 150 / FM 1374 / FM 1375 – New Waverly	Signed as exit 103 southbound
		109	PR 40 – Huntsville State Park
	Huntsville	112	SH 75 – Sam Houston State University	Northbound alternate to downtown Huntsville
		113	SH 19 – Riverside, Crockett, Grapeland	Northbound exit and southbound entrance
		114	FM 1374 (Montgomery Road) – Sam Houston State University
		116	US 190 east (11th Street) / SH 30 – Huntsville, College Station, Livingston – Lake Livingston	South end of US 190 overlap
		118	SH 75 / FM 1791 – Sam Houston State University, Huntsville – Huntsville Regional Airport
		123	FM 1696
		132	FM 2989
Madison		136	Spur 67
	Madisonville	142	US 190 west / SH 21 – Bryan, Crockett	North end of US 190 overlap
		146	SH 75 – Madisonville
		152	SH OSR – Normangee
Leon		156	FM 977 – Leona
	Centerville	164	SH 7 – Centerville
	Buffalo	178	US 79 – Buffalo, Palestine, Jacksonville
		180	SH 164 – Groesbeck
Freestone		189	SH 179 – Teague
	Fairfield	197	US 84 – Fairfield, Teague
		198	FM 27 – Fairfield, Wortham
		206	FM 833
		211	FM 80 – Streetman, Kirvin
Navarro		213	SH 75 / FM 246 – Streetman, Wortham	Former US-75
		218	FM 1394 – Richland	Northbound exit and southbound entrance
		219A	SH 14 – Richland, Mexia	No northbound exit
		219B	Frontage Road	Southbound exit and northbound entrance
		220	Frontage Road
		221	Frontage Road
		225	FM 739 – Angus, Mustang
	Corsicana	228A	15th Street	Southbound exit is via exit 228B
		228B	I-45 Bus. north / Frontage Road – Corsicana
		229	US 287 south – Palestine	South end of US 287 overlap
		231	SH 31 – Waco, Athens
		232	Roane Road, East 5th Avenue
		235B	I-45 Bus. south – Corsicana	Southbound exit and northbound entrance
		235A	Frontage Road	Signed as exit 235 northbound
		237	Frontage Road
		238	FM 1603
		239	FM 1126
	Rice	242	Calhoun Street – Rice
		243	Frontage Road
Ellis		244	FM 1182
	Alma	246	FM 1183 – Alma
		247	US 287 north – Waxahachie, Fort Worth	North end of US 287 overlap
	Ennis	249	I-45 Bus. north / FM 85 – Ennis
		251A	FM 1181 (Creechville Road)
		251B	SH 34 – Kaufman, Italy
		253	I-45 Bus. south – Ennis
		255	FM 879 – Garrett
	Palmer	258	I-45 Bus. north / Parker Hill Road – Palmer
		259	FM 813 (Jefferson Street)
		260	I-45 Bus. south / Frontage Road – Palmer
		262	Frontage Road
		263A	Loop 561 – Trumbull
		263B	Frontage Road	Northbound exit and southbound entrance
		264	Frontage Road	Southbound exit and northbound entrance
		265	I-45 Bus. north	Northbound exit and southbound entrance
	Ferris	266	FM 660 (5th Street)
		267	Frontage Road
Dallas		268	I-45 Bus. south / Malloy Bridge Road
		269	Mars Road
	Wilmer	270	Belt Line Road
		271	Pleasant Run Road
	Hutchins	272	Fulghum Road
		273	Wintergreen Road
		274	Dowdy Ferry Road, Palestine Street
	Dallas	275	SH 310 north	Northbound exit and southbound entrance;
		276	I-20 (Lyndon B. Johnson Freeway) – Fort Worth, Shreveport	Signed as exits 276A (west) and 276B (east)
		277	Simpson Stuart Road
		279	Loop 12	Signed as exits 279A (east) and 279B (west) northbound
		280	Illinois Avenue, Linfield Street
		281	Overton Road	Southbound exit and northbound entrance
		283A	Lamar Street
		283B	Pennsylvania Avenue, Martin Luther King, Jr. Boulevard	Northbound exit and southbound entrance
		283B	US 175 east (C.F. Hawn Freeway) / Martin Luther King, Jr. Boulevard – Kaufman	Southbound exit and northbound entrance
		284A	I-30 (East R. L. Thornton Freeway)
		284B	Main Street west, Elm Street	Northbound exit and southbound entrance
		284C	Live Oak Street – Downtown Dallas	Southbound exit and northbound entrance
		285	Bryan Street east	Northbound exit and southbound entrance
		285	Ross Avenue	Southbound exit and northbound entrance
		286A	Spur 366 west (Woodall Rodgers Freeway) to I-35E – Denton	Northbound exit and southbound entrance
			US 75 north (Central Expressway) – McKinney	Northbound exit and southbound entrance

See also

• Future Interstate Highways
• Interstate 345
• Texas State Highway 3
• Texas State Highway 75
• U.S. Route 75
• U.S. Route 175

References

1. ^ Texas Department of Transportation, Highway Designation File: Interstate Highway No. 45
2. ^ Tony Hartzel, The Dallas Morning News, Road names honor Texas leaders, July 7, 2002
3. ^ American Association of State Highway and Transportation Officials, List of Control Cities for Use in Guide Signs on Interstate Highways, 2001
4. ^ Texas Freeway - Interstate 45 South, the Gulf Freeway
5. ^ Houston Streetcars - Galveston-Houston Interurban
6. ^ Texas State Highway Department, General Highway Map - Harris County Texas, Supplementary Sheet 3 of 4, 1936 (revised to November 23, 1939)
7. ^ Texas State Highway Department, General Highway Map - Galveston County Texas, 1936 (revised to November 23, 1939)
8. ^ Satellite image of Gulf Freeway and Interstate 610 interchange. Google Maps. Last accessed September 25, 2006.
9. ^ Clearing up confusion of multiple highway names Houston Chronicle, November 20, 2005.
10. ^ ^{a b} Texas Department of Transportation, Highway Designation File: Interstate Highway No. 345
11. ^ Commerce Journal, Highway Commission Adopts 25 Highways, July 6, 1917
12. ^ State Highway Department, Map Showing Proposed System of State Highways as Adopted June 1917
13. ^ Texas State Highway Department, Highway Map: State of Texas, October 1, 1919
14. ^ United States System of Highways, November 11, 1926
15. ^ Texas Highway Department, Official Travel Map, 1954 Edition
16. ^ ^{a b c d e f g h i j} Slotboom, Erik (2003). "Chapter 4: The Spokes". Houston Freeways: A Historical and Visual Journey. Oscar F. "Erik" Slotboom. ISBN 0974160539. http://www.houstonfreeways.com/. 
17. ^ Rand McNally & Company, Houston, Texas, 1946, published by Sinclair Oil
18. ^ Chamber of Commerce of the United States, Business Action for Better Cities, 1952, p. 66
19. ^ American Association of State Highway Officials, Proceedings: Convention Group Meetings, Papers and Discussions, Kansas City, Missouri, 1952
20. ^ Texas Department of Transportation archive library, aerial view of the downtown end of the Gulf Freeway, 1953
21. ^ Rand McNally & Company, Houston, Texas, 1953, published by Sinclair Oil
22. ^ Slotboom, Erik (2003). "Chapter 5: The Loops". Houston Freeways: A Historical and Visual Journey. Oscar F. "Erik" Slotboom. ISBN 0974160539. http://www.houstonfreeways.com/. 
23. ^ Texas Department of Transportation archive library, aerial view of the Gulfgate Shopping Center, ca. 1960s
24. ^ ^{a b c d e f} Federal Highway Administration, National Bridge Inventory, 2006
25. ^ Texas Department of Transportation, Highway Designation File: State Highway No. 3
26. ^ ^{a b} General Drafting Company, Houston, 1955, published by Humble Oil
27. ^ ^{a b} General Drafting Company, Houston, 1958, published by Humble Oil
28. ^ Texas State Highway Department, General Highway Map: Galveston County, Texas, 1957 (state highways revised to January 1, 1961)
29. ^ ^{a b} Slotboom, Erik (2003). "Chapter 6: Freeway Mass Transit". Houston Freeways: A Historical and Visual Journey. Oscar F. "Erik" Slotboom. ISBN 0974160539. http://www.houstonfreeways.com/. 
30. ^ Texas Department of Transportation, Reconstruction of IH 45—Gulf Freeway in Webster Announced, June 11, 2007
31. ^ Dana Guthrie (May 27, 2011). "Gulf Freeway construction to begin this summer". Your Houston News. http://www.yourhoustonnews.com/bay_area/news/article_e41c64f7-8092-57e1-87c7-68b70a8c267f.html. Retrieved June 29, 2011. 
32. ^ Woods, Eric (June 28, 2011). "I-45 corridor work kicks off summer travel season". Ultimate Clear Lake. http://ultimateclearlake.com/stories/251016-i-45-corridor-work-kicks-off-summer-travel-season. Retrieved July 6, 2011. 
33. ^ Slotboom, Erik (2003). "Chapter 1: Building the System". Houston Freeways: A Historical and Visual Journey. Oscar F. "Erik" Slotboom. ISBN 0974160539. http://www.houstonfreeways.com/. 
34. ^ Slotboom, Erik (2003). "Chapter 3: Downtown Freeways". Houston Freeways: A Historical and Visual Journey. Oscar F. "Erik" Slotboom. ISBN 0974160539. http://www.houstonfreeways.com/. 
35. ^ General Drafting Company, Houston, Texas, 1961, published by Humble Oil
36. ^ ^{a b c} General Drafting Company, Texas, 1961, published by Humble Oil
37. ^ Rad Sallee, Houston Chronicle, Rail on Richmond idea first rejected back in '83, April 23, 2006
38. ^ ^{a b} Federal Highway Administration, Previous Interstate Facts of the Day, accessed August 2007
39. ^ Urban History: Central Expressway, accessed August 2007
40. ^ Dallas Times Herald, City Seeks Freeway Project, June 22, 1958
41. ^ Dallas Morning News, Interstate 45 to Open Feb. 25, February 15, 1976
42. ^ Dallas Morning News, North Central Turns 35 Today, August 19, 1984
43. ^ Texas Department of Transportation Highway Designation Files, "Interstate Highway No. 20", March 12, 2010. Retrieved 2010-07-21.
44. ^ Texas Department of Transportation Highway Designation Files, "Interstate Highway No. 635", March 12, 2010. Retrieved 2010-07-21.
45. ^ Tony Hartzel, Dallas Morning News, Road to Better Driving, October 29, 2000

External links

• Interstate Guide: I-45
• I-45 info/history page --from dfwfreeways.info
• METRO - Gulf Freeway HOV system & map

edit Main Interstate Highways (major interstates highlighted)
4	5	8	10	12	15	16	17	19	20	22	24	25	26	27	29	30
35	37	39	40	43	44	45	49	55	57	59	64	65	66	68	69
70	71	72	73	74	75	76 (W)		76 (E)		77	78	79	80	81	82
83	84 (W)		84 (E)		85	86 (W)		86 (E)		87	88 (W)		88 (E)		89	90
91	93	94	95	96	97	99	H-1		H-2		H-3
Unsigned			A-1		A-2		A-3		A-4		PRI-1		PRI-2		PRI-3
Lists		Primary			Main - Intrastate - Suffixed - Temporary - Future - Gaps
		Auxiliary			Main - Future - Unsigned
		Other			Standards - Business - Bypassed - Tolled