page_title: List of highways in Harris County, Texas
section_title: Interstate Highways and U.S. Highways
hierarchical_section_title: List of highways in Harris County, Texas / Highways / Interstate Highways and U.S. Highways
caption_attribution_description: Took this awesome pic of i-10 and i-45 right at the northern edge of downtown Houston.
context_page_description: The state highways in Harris County, Texas consists of approximately 1,213 miles of routes in the Texas state highway system that are located within Harris County. These highways are maintained by the Texas Department of Transportation. These highways are made up of Interstate Highways, U.S. Highways, State Highways, State Loop and Spur Highways, Farm to Market Roads, Park Highways, and Alternate and Business Routes. In addition to these highways, three independent Toll Roads and a section of Interstate 10 that is toll managed are also located in Harris County. These roads are maintained by the Harris County Toll Road Authority, and add approximately 120 miles of highways to the overall Harris County highway system.
  There are four interstates located within Harris County. They consist of three major interstates and one Auxiliary Interstate. There are also three U.S. Routes located in Harris County. These highways consist of U.S. Route 59, U.S. Route 90, and U.S. Route 290.
context_section_description: There are four interstate highways located in Harris County. These interstates are I-10, which runs west–east, I-45, which runs south–north, I-69, which also runs south-north, and I-610, which forms a small loop around Downtown Houston. I-10 and I-45 run concurrently with each other for a short distance in Downtown Houston. I-10 was created in 1959, with the establishment the Interstate Highway System; I-45 was created in 1971; the first segment of I-69 (concurrent with US 59) was created on July 26, 2012, the second segment (also concurrent with US 59) was created on February 28, 2013, the third and final segment (like the previous two segments is concurrent with US 59 as well) was created on March 25, 2015, when it is fully complete the mainline of I-69 will run from the U.S.–Mexico border in Brownsville to the U.S.–Canada border in Port Huron, MI; I-610 was created in 1959, with the establishment of the Interstate Highway System.
  In addition to the four interstate highways, there are also three U.S. Routes. These highways are US 59, which forms the Southwest and Eastex Freeways, and runs southwest-northeast, US 90, which runs concurrently with I-10 from the west county border to I-610, where it becomes the Cosby Freeway, running in a west–east direction, and US 290, which forms the Northwest Freeway, running southeast-northwest.
caption: The short concurrency between I-10/US 90 and I-45
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