Roadway Safety Data Integrator (RSDI) Tool & Integrated Highway Safety Information System (HSIS) Datasets

The Highway Safety Information System (HSIS) is a database that maintains crash data, roadway inventory, and traffic volume data for several US states. It is an excellent source of data to highway safety research and can be used to investigate many research questions. However, to prepare an analysis-ready roadway safety dataset based on the HSIS or any databases that store the data in multiple different subsets and follow linear referencing, the researchers should integrate multiple datasets, merge or unmerge and remove certain inconsistent records, and finally clean the dataset. The HSIS staff is usually accommodating and eager to help, but sometimes the nature of data needs is complicated and laborious.
A tool named Roadway Safety Data Integrator (RSDI) was developed for combining, segmenting, and selecting homogeneous HSIS roadway segments and also crash assignment by desired crash fields (e.g., crash severity or type). The RSDI tool can be helpful for integrating different safety-related datasets such as roadway inventory (including grade, curve, and other subsets), traffic volume, and crash data; also, it can do required segmentation and identify the homogeneous roadway segments over the desired years of study that are the basis for development and calibration of the HSM predictive models. The RSDI tool can be used for similar purposes and not only limited to the HSIS data. It can be used for segmentation and finding homogeneous segments of any datasets that follow linear referencing.
The data consists of the following items:
- The RSDI tool and its guide
- Integrated and raw HSIS data from states of Illinois (R2U: 2005-10) and Washington (R2U: 2010-15)

R2U: Rural two-lane, two-way roads

高速公路安全信息系统（Highway Safety Information System，HSIS）是为美国多州维护碰撞数据、道路资产清单及交通流量数据的数据库。它是开展高速公路安全研究的优质数据来源，可用于探究诸多研究问题。然而，若要基于HSIS或任何采用多子集存储且遵循线性参考（linear referencing）的数据库，制备可用于分析的道路安全数据集，研究人员需整合多份数据集、执行合并或拆分操作、移除部分不一致记录，并最终完成数据集清洗。HSIS的工作人员通常乐于提供协助，但有时数据需求的性质较为复杂且耗时费力。
一款名为道路安全数据整合器（Roadway Safety Data Integrator，RSDI）的工具已被开发，该工具可用于合并、分割并筛选同质化的HSIS道路路段，同时可依据指定的碰撞字段（如碰撞严重程度或碰撞类型）分配碰撞数据。RSDI工具不仅可整合各类与安全相关的数据集，例如道路资产清单（含坡度、曲线等子集）、交通流量数据与碰撞数据，还能完成必要的路段分割，并在指定研究年限内识别同质化道路路段——这正是道路安全手册（Highway Safety Manual，HSM）预测模型开发与校准的核心基础。此外，RSDI工具的应用场景并不局限于HSIS数据，还可用于其他遵循线性参考的数据集的路段分割与同质化路段识别。
本数据集包含以下内容：
- RSDI工具及其使用指南
- 来自伊利诺伊州（R2U：2005-2010年）与华盛顿州（R2U：2010-2015年）的整合后HSIS数据与原始HSIS数据
R2U：乡村双向双车道道路