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Evaluating Safety Performance by Segment

This study analyzes the safety performance of different commodity segments in the motor carrier industry. It examines which segments are the safest and least safe, if the results are consistent over time, and if the differences are statistically significant. The study provides insights for regulatory development and industry improvement.

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Evaluating Safety Performance by Segment

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  1. Motor Carrier Industry Profile Study Evaluating Safety Performance by Segment Tom Keane Economist Federal Motor Carrier Safety Administration Traffic Records Forum July 27, 2004

  2. Motor Carrier Industry Profile Study Objectives • Which commodity segments are the safest (and least safe)? • Do results hold over time? • Are differences statistically significant?

  3. Building Materials Dry Bulk Refrig. Foods Household Goods Intermodal Large Machinery Passenger Produce Tank General Freight Motor Carrier Industry Profile Study Commodity Segments

  4. MCMIS Driver OOS Rate* Vehicle OOS Rate * Fatal Crash Rate Total Crash Rate Safestat Driver SEA** Vehicle SEA** Accident SEA** Enforcement Severity Safety Mgmt Review Motor Carrier Industry Profile Study Data Sources *Out-of-Service (OOS) Rate ** Safety Evaluation Area (SEA) Score

  5. Motor Carrier Industry Profile Study Analytical Approach • Calculate means (avg) • For each segment • For each of 9 measures • Compare means across segments, for each measure • Multiple Comparisons (statistical) Testing • 95% confidence level • Rank Segments by Mean Scores • “B” = best performer • “W” = worst performer

  6. Sample 2002 Results

  7. Sample 3-Yr Results (2000-2002) * Upper case “B” or “W” denotes significantly better or worse performance than peers

  8. INDUSTRY PROFILE STUDYHow are results being used? • Regulatory development • Passenger Carriers - crash profile • Studies for Reauthorization • Intermodal Carriers – vehicle condition

  9. 3-Year Results (2000-2002) Conclusions • “Safer” segments • Bus • Tank • “Less safe” segments • HH Goods • Intermodal • Produce • Bulk • Overall Rankings are qualitative & relative

  10. Motor Carrier Industry Profile Study http://ai.fmcsa.dot.gov/ Under “Current Reports & Results” Tom Keane Tom.Keane@fmcsa.dot.gov Phone: (202) 366-4025

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