Roadway SubBlock

SubBlock represent the near-full extent of our centerline network (only driveways are excluded). SubBlock is the finest grained, 'base' segments from which all other segmentation patterns can be constructed (including Blocks). SubBlock is the original source features for our DDOT Street Centerlines data. Road types include streets, Alleys, Ramps, Service Roads, and Trails. Previously called Roadway Segments. For more information please visit DDOT's wiki page.子块（SubBlock）涵盖了本中心线网络的近乎全部范围，仅排除了车道（driveways）。子块（SubBlock）是最细粒度的“基础”路段，可用于构建包括区块（Blocks）在内的所有其他分割模式。子块（SubBlock）为本DDOT街道中心线数据集的原始源特征。道路类型涵盖街道、背街小巷（Alleys）、匝道（Ramps）、服务车道（Service Roads）以及步道（Trails）。该类路段此前曾被称为道路路段（Roadway Segments）。如需获取更多详细信息，请访问DDOT的维基页面。