Road Safety Audit for the Intersection of US 59 and IA 9 in Osceola County, Iowa

The Iowa Department of Transportation (DOT) requested a road safety audit (RSA) of the US 59/IA 9 intersection in northwestern Iowa, just south of the Minnesota border, to assess intersection environmental issues and crash history and recommend appropriate mitigation to address the identified safety issues at the intersection. Although the number of crashes at the location has not been significantly higher than the statewide average for similar intersections, the severity of these crashes has been of concern. This RSA was unique in that it included intersection video observation and recorded traffic conflict data analysis, along with the daylight and nighttime field reviews. This report outlines the findings and recommendations of the RSA team for addressing the safety concerns at this intersection.

• Record URL:
  • http://www.intrans.iastate.edu/research/documents/research-reports/US_59-IA_9_RSA_w_cvr.pdf
• 
• Corporate Authors:

  Iowa State University, Ames

  Institute for Transportation
  Ames, IA  United States  50010-8664

  Iowa Department of Transportation

  800 Lincoln Way
  Ames, IA  United States  50010
• Authors:
  • McDonald, Thomas J
• Publication Date: 2012-3

Language

• English

Media Info

• Media Type: Web
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 44p

Subject/Index Terms

• TRT Terms: Countermeasures; Crash severity; Recommendations; Rural areas; Safety audits; Traffic conflicts; Unsignalized intersections; Video
• Geographic Terms: Osceola County (Iowa)
• Subject Areas: Highways; Safety and Human Factors; I80: Accident Studies;

Filing Info

• Accession Number: 01379786
• Record Type: Publication
• Report/Paper Numbers: InTrans Project 11-421
• Files: TRIS, STATEDOT
• Created Date: Aug 2 2012 4:16PM