TxDOT Control Sections

A control section is a unique identifier for individual segments of a roadway. Historically control sections were only assigned to on-system, or state-maintained, highways, and were created as a highway referencing system for planning and maintenance projects, etc. However, this dataset also includes off-system, or non-state-maintained, roadways. Control Section numbers are assigned for the life of the roadway and generally do not change or move, regardless of improvements to the roadway. Currently, control sections are located geographically along roadway using linear referencing. The data was created by the TxDOT Transportation Planning and Programming Division's Data Management Section. This data contains measures. Measures are stored as M-values within each vertex along the line, in the same way that some datasets store z-values for the elevation, except that measures store the distance from the origin, or DFO, of the line. M-enabled networks serve as a framework for locating roadway assets along the network using linear referencing. This data set must be downloaded as a file geodatabase in order to keep M-values intact. If downloaded as a shapefile or added to a map from a connection to ArcGIS online, measures will not applied to the line. Update Frequency: 1 Months Source: Geospatial Roadway Inventory Database (GRID) Security Level: Public Owned by TxDOT: True Related Links Data Dictionary PDF [Generated 2025/05/21]控制路段（Control Section）是道路单个分段的唯一标识符。过往控制路段仅被分配至系统内道路（即州养护公路），最初作为公路参照体系，用于规划、养护项目等场景。但本数据集同时涵盖系统外道路（即非州养护道路）。 控制路段编号在道路全生命周期内固定分配，通常不会因道路改造而变更或迁移。当前，控制路段通过线性参照技术实现道路沿线的地理定位。 本数据集由得克萨斯州交通局（Texas Department of Transportation，简称TxDOT）交通规划与项目司的数据管理部门编制，包含测量值（Measures）：测量值以M值（M-values）的形式存储于道路线的每个顶点处，其存储原理与部分数据集存储高程Z值类似，区别在于测量值存储的是道路线原点（Distance From Origin，简称DFO）对应的距离。支持M值的路网可作为基于线性参照技术定位道路资产的框架。 若需保留完整的M值，本数据集必须以文件地理数据库（File Geodatabase）格式下载。若以形状文件（Shapefile）格式下载，或通过ArcGIS Online的连接添加至地图，则测量值无法应用于道路线。 更新频率：每月1次 数据源：地理空间道路库存数据库（GRID） 安全级别：公开 所属机构：得克萨斯州交通局（TxDOT） 相关链接：数据字典PDF [生成于2025/05/21]