Develop Crash Modification Factors for Super 2 Highways

Super 2 highways have been used across Texas for over 20 years, providing operational and safety benefits to rural two-lane highways at lower cost than widening to four-lane, and more are planned as the demand increases on the state highway system. Previous Super 2 research has provided insights on safety improvements, but Texas Department of Transportation (TxDOT) would benefit from an updated crash modification factor (CMF) based on a rigorous review and analysis of recent crash data from the state’s many Super 2 highways. This CMF would provide additional support for installing Super 2 corridors throughout the state and complement existing guidance. The research teams will use their existing database of Super 2 highways and site characteristics, combined with additional data on traffic volumes, crashes, and other relevant factors, to develop a comprehensive Super 2 dataset for analysis and identification of relationships between crashes and other characteristics. Using the results of this analysis, the research teams will define one (1) or more CMFs or crash modification functions (CMFunctions) that TxDOT and other practitioners can use to make decisions on installing future Super 2 corridors. The research teams will disseminate these CMFs to the Federal Highway Administration’s (FHWA's) CMF Clearinghouse for inclusion in their database.

• Record URL:
  • https://library.ctr.utexas.edu/Presto/project=7183

Language

• English

Project

• Status: Completed
• Funding: $236030
• Contract Numbers:

  0-7183

• Sponsor Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Managing Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Project Managers:

  Dassi, Martin

• Performing Organizations:

  Texas A&M Transportation Institute

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

  Texas State University, San Marcos

  JCK Building, Suite 489
  San Marcos, TX  United States 
• Principal Investigators:

  Brewer, Marcus

• Start Date: 20230901
• Expected Completion Date: 20241130
• Actual Completion Date: 20241130

Subject/Index Terms

• TRT Terms: Crash analysis; Crash characteristics; Crash modification factors; Data files; Two lane highways
• Geographic Terms: Texas
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01894815
• Record Type: Research project
• Source Agency: Texas Department of Transportation
• Contract Numbers: 0-7183
• Files: RIP, STATEDOT
• Created Date: Sep 27 2023 3:10PM