The Highway Safety Information System (HSIS), established in 1987, is a foundational highway research data system. The City of Charlotte has participated in the HSIS program since 2004, providing quality data to HSIS for use by researchers through a request system. In 2021, HSIS  began a modernization effort with the goal of expanding the technological and analytic capabilities of the data system. This modernization provides an increased emphasis on spatial analysis and cloud-based data management.
 

What Has Changed
 

This guidebook is intended to support the use of Charlotte HSIS data for the years 2018 and beyond. Data and documentation prior to 2018 (2004-2017) are available upon request to the HSIS Virtual Laboratory. Prior to 2018, the Charlotte datasets included variables for the following files:
 

1. Roadway inventory.
2. Accident characteristics.
3. Vehicles involved in crashes.
4. Vehicle occupants involved in crashes.

The revised Charlotte database incorporated into HSIS contains 13 different files:
 

1. Roadway inventory (including traffic information).
2. Crash characteristics.
3. Units involved in crashes.
4. Persons involved in the crash.
5. Bicycle lane inventory.
6. Sidewalk inventory
7. Bus route inventory.
8. Bus stop inventory.
9. Light rail route inventory.
10. Light rail stop inventory.
11. Greenway inventory.
12. Intersection inventory.
13. Railroad line inventory