FHWA Reduced Urban/Rural Dataset

Project Description The NDS Urban/Rural data set was developed to generate additional trip summary measures data based on whether a road traversed during the SHRP2 NDS was considered urban or rural. To remain consistent with other SHRP2 NDS data sources, the link representation was used for the supplemental speed limit data set. The links layer provided with the RID facilitated the mapping of the LRS road segments to the link road segments format. Data Request Scope The Urban/Rural data set is comprised of two data sets: Additional Trip Summary Measures and Distributions by Site. Data Specification Each row of the Additional Trip Summary Measures data set represents a trip in the SHRP2 NDS database. For each trip, 16 additional data measures were added to the existing Trip Summary Measures table. Details can be found in the accompanying documetation. Each row of the Distributions by Site data set represents one of the six sites where SHRP2 NDS data was collected. For each site, 28 distributions of speed, duration, and distance were calculated. Details can be found in the accompanying documentation.

项目说明
NDS城乡数据集旨在基于SHRP2 NDS研究中所经道路的城乡属性，生成额外的出行汇总指标数据。为与其他SHRP2 NDS数据源保持一致，本补充限速数据集采用链路表示法。RID附带的链路图层可实现LRS道路路段到链路道路路段格式的映射转换。

数据请求范围
本城乡数据集包含两个子数据集：额外出行汇总指标数据集与按站点分布数据集。

数据规范
额外出行汇总指标数据集的每一行对应SHRP2 NDS数据库中的一次出行。针对每次出行，现有出行汇总指标表新增16项数据指标，详细信息可参阅随附文档。
按站点分布数据集的每一行对应SHRP2 NDS数据采集的6个站点之一。针对每个站点，共计算得到28项速度、时长与距离的分布数据，详细信息可参阅随附文档。

搜集汇总

背景与挑战

背景概述

该数据集基于SHRP2 NDS项目，旨在根据道路在城市或农村区域的分类，补充行程总结指标数据。它包含两个部分：一是'Additional Trip Summary Measures'，为每个行程添加16个额外指标；二是'Distributions by Site'，为六个数据收集站点计算28个速度、持续时间和距离的分布。数据集采用链接表示法以确保与其他数据源的一致性。