Iowa Department of Transportation

Safety Research Studies - Iowa DOT

Tom Welch, State Safety Engineer
Office of Traffic and Safety
800 Lincoln Way
Ames, Iowa 50010
(515) 239-1557
(Tom.Welch@dot.iowa.gov)

2005
   

Iowa’s Experience with “Road Diet” Measures: Impacts on Crash Frequencies and Crash Rates Assessed Following a Bayesian Approach

      Paper    Abstract   

Pawlovich, M., W. Li, A. Carriquiry, and T. Welch. “Iowa’s Experience with “Road Diet” Measures: Impacts on Crash Frequencies and Crash Rates Assessed Following a Bayesian Approach,“ Transportation Research Record, in review.  http://www.iowadot.gov/crashanalysis/pdfs/trb_roaddiet_papersubmission_08012005.pdf   1.2MB (pdf), August 2005

   
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Pavement Marking Management: An Integrated Approach

   
      Project Page   

Rural Expressway Intersection Characteristics that are a Factor in Reducing Safety Performance

   
      Project Page   

Whether Weather Matters to Traffic Demand, Traffic Safety, and Traffic Operations and Flow

   
      Project Page   

Safety Effectiveness of Stop Control At Very Low Volume Unpaved Intersections

   
      Project Page   

Safety Performance of Rural Expressway Intersections

   
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Matched Pair Safety Analysis of Four-Lane to Three-Lane road Conversions in Iowa

   
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Traffic Impacts of School Zones

   
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School Transportation Modes for Urban and Suburban Elementary Schools in Iowa

   
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Safety Impact of Roadway Lighting at Isolated Rural Intersections

   
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Quantifying the Magnitude and Characteristics of Pavement Edge Drop-Off Crashes

   
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A Survey Of State Practices With Regard To Pavement Edge Drop-Offs

   
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Safety of High Speed Expressway Intersections: Data Preparation, Matched-Pairs and Empirical Bayes Assessment

To see more traffic safety-related research done in Iowa, see the CTRE Traffic Safety-related Publications webpage at http://www.ctre.iastate.edu/pubs/trafficsafety.htm.

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