Rural Speed Safety Project for USDOT Safety Data Initiative

The objective of this project was to examine prevailing operating speeds on a large scale to determine how speed and speed differentials interact with roadway characteristics to influence the likelihood of crashes. The project team conducted three major tasks: (a) developed conflated databases for Ohio and Washington by incorporating the Highway Safety Information System (HSIS) and the National Performance Management Research Data Set; (b) developed static and interactive data visualization tools to show the association between operating speed measures and safety outcomes; and (c) developed best-fit models at annual and daily levels to address the impact of operating speed on safety. The overall finding was that speed-related operational information is an area of opportunity to better understand safety outcomes. This pilot project established the framework of data conflation and an analytical pipeline that will help to address the effect of operation speed measures on safety. The replicability procedure developed in this study can be applied to other HSIS States. The project team developed a weblink that includes descriptive statistics and data visualization tools (both static and interactive). The links provide a more detailed view of the speed measures and descriptive statistics, as well as visualization of the association between speed measures and crashes at a granular level. The team members also developed an interactive decision support tool (https://ruralspeedsafety.shinyapps.io/rss_sdi/) to show annual risk scoring using Washington and Ohio data that contain expected total crashes from the developed models.

• Dataset URL:
  https://doi.org/10.21949/1519283
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/48840
• Dataset URL:
  https://rosap.ntl.bts.gov/view/dot/57481
• Supplemental Notes:
  • Supporting dataset available at: https://rosap.ntl.bts.gov/view/dot/57481; https://doi.org/10.21949/1519283
• Corporate Authors:

  Texas A&M Transportation Institute

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135

  Office of the Secretary of Transportation

  Office of the Assistant Secretary for Transportation Policy, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Das, Subasish
  • Geedipally, Srinivas
  • Avelar, Raul
  • Wu, Lingtao
  • Fitzpatrick, Kay
  • Banihashemi, Mohamadreza
  • Lord, Dominique
• Publication Date: 2020-3

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; References; Tables;
• Pagination: 120p

Subject/Index Terms

• TRT Terms: Crash rates; Crash risk forecasting; Databases; Decision support systems; Highway safety; Operating speed; Rural highways; Statistical analysis
• Identifier Terms: National Performance Management Research Data Set (NPMRDS); Highway Safety Information System
• Geographic Terms: Ohio; Washington (State)
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 01738882
• Record Type: Publication
• Contract Numbers: DTFH6116D00039L
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: May 8 2020 3:57PM