Crash Analysis of I-64 Closure in St. Louis County

On January 2, 2008, the Missouri Department of Transportation (MoDOT) closed significant portions of Missouri Interstate 64 (I-64) in St. Louis County for reconstruction. During the planning stages of this project, the proposal to close all lanes of I-64 was met with public concern regarding the possible safety risks associated with diverting I-64 traffic to adjacent roadways. A specific concern was the possibility of increased crash rates on roads designated to receive I-64 traffic flow. The following research was conducted to assess the actual outcomes related to these concerns. Crash analyses and crash rate analysis of 2008 and 2009 crash data were performed. The data were compared to four years of pre-closure crash data. Overall results suggest no evidence of increased crash rates on roadways adjacent to I-64 resulting from the two-year closure period. The study indicated that crash rates on 17 roadways were 8.9% below average in 2008 and 14.7% below average in 2009. Crash rates declined for most freeways, expressways, and major arterials in the surrounding region. Rear-end crashes declined noticeably from 7,757 in 2007 to 6,728 in 2009.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/25829
• Supplemental Notes:
  • This research was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Missouri University of Science and Technology, Rolla

  Department of Civil, Architectural and Environmental Engineering
  1401 N Pine Street
  Rolla, MO  United States  65409

  Missouri Department of Transportation

  105 West Capitol Avenue
  Jefferson City, MO  United States  65102

  Mid-America Transportation Center

  University of Nebraska-Lincoln
  2200 Vine Street, PO Box 830851
  Lincoln, NE  United States  68583-0851

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Bham, Ghulam H
  • Manepalli, Uday R R
• Publication Date: 2011-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Maps; Tables;
• Pagination: 19p

Subject/Index Terms

• TRT Terms: Crash rates; Interstate highways; Street closure; Traffic diversion
• Geographic Terms: Missouri
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I81: Accident Statistics;

Filing Info

• Accession Number: 01482562
• Record Type: Publication
• Report/Paper Numbers: 25-1121-0001-341
• Files: UTC, TRIS, RITA, ATRI, USDOT, STATEDOT
• Created Date: May 29 2013 10:55AM