TxDOT Roadbed Base

The Roadbed Base describes the base pavement type below the roadbed surface. Roadbed Base (i.e. Base Type) is a required asset for reporting to FHWA as part of the HPMS submittal. Update Frequency: 3 Months Source: Geospatial Roadway Inventory Database (GRID) Security Level: Public Owned by TxDOT: True Related Links Data Dictionary PDF [Generated 2025/04/24]路基基层（Roadbed Base）用于描述路基表层下方的基层路面类型。路基基层（即基层类型，Base Type）是向美国联邦公路管理局（Federal Highway Administration，FHWA）提交公路性能监测系统（Highway Performance Monitoring System，HPMS）申报材料时所需的必备数据资产。更新频率：每3个月。数据来源：地理空间道路清单数据库（Geospatial Roadway Inventory Database，GRID）。安全级别：公开。权属归属得克萨斯州交通运输部（Texas Department of Transportation，TxDOT），情况属实。相关链接：数据字典PDF文件 [生成时间：2025/04/24]