TxDOT Urbanized Areas

After each decennial census, the US Census Bureau develops Urban Areas that consist of a central core and adjacent densely settled territory that together contain at least 2,500 residents. For transportation planning purposes, however, only areas with a population of 5,000 are considered urban. These areas of over 5,000 population are then adjusted outwardly to capture additional areas and minimize situations where a given roadway goes into and out of the original census area. (see https://www.fhwa.dot.gov/planning%20/processes/statewide/related/highway_functional_classifications/section06.cfm) Areas with a population of between 5,000 and 49,999 are called Small Urban Areas. These areas are assigned a unique number that must be between 600 and 999. In 2020, there are 153 such areas in Texas. Areas with a population of between 50,000 and 199,999 are called Urbanized Areas and are assigned a unique number less than 600. In 2020, there are 20 such areas. Areas with a population of of 200,000 or more are called Large Urbanized Areas and are assigned a unique number less than 600. In 2020, there are 16 such areas. All Urbanized Areas and Large Urbanized Areas require a Metropolitan Planning Organization (MPO) to shepherd the transportation planning process. MPOs that cover Large Urbanized Areas are considered Transportation Management Areas. Update Frequency: As Needed Source: Federal Highway Administration (FHWA) Security Level: Public Owned by TxDOT: False Related Links Data Dictionary PDF [Generated 2025/03/17]每十年一次的人口普查结束后，美国人口普查局（US Census Bureau）会划定都市区（Urban Areas），这类区域由一个核心城区及毗邻的高密度定居区域组成，总人口不少于2500人。不过出于交通规划的考量，仅将人口规模达5000人及以上的区域认定为城市区域。随后，这类人口超5000的区域会向外扩展调整，以覆盖更多周边区域，并尽可能减少指定道路往返于原普查区域的情形。（参考来源：https://www.fhwa.dot.gov/planning%20/processes/statewide/related/highway_functional_classifications/section06.cfm） 人口介于5000至49999人之间的区域被称为小型都市区（Small Urban Areas），这类区域会被分配一个介于600至999之间的唯一编号。2020年，得克萨斯州境内共有153个此类区域。 人口介于50000至199999人之间的区域被称为城市化区域（Urbanized Areas），会被分配一个小于600的唯一编号。2020年，该州共有20个此类区域。 人口达200000人及以上的区域被称为大型城市化区域（Large Urbanized Areas），同样被分配小于600的唯一编号。2020年，该州共有16个此类区域。 所有城市化区域与大型城市化区域均需由大都市规划组织（Metropolitan Planning Organization, MPO）牵头开展交通规划流程。覆盖大型城市化区域的MPO被认定为交通管理区（Transportation Management Areas）。 更新频率：按需更新 来源：美国联邦公路管理局（Federal Highway Administration, FHWA） 安全等级：公开 由得克萨斯州运输部（TxDOT）持有：否 相关链接：数据字典PDF [生成时间：2025/03/17]