Table of Contents

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Index

Technical Report

Executive Summary

Background

Rear Window Defrogger and Wiper Information

State Crash Data

Analysis Databases

Analysis Method

Hypotheses -

• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES IN THE PRESENCE OF ANY ONE OR MORE CONDITIONS WHEN THEY ARE MOST LIKELY USED (but the effect does not increase if there is more than one adverse condition) and

• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES ALL THE TIME

Hypotheses -

• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES AND THE EFFECTS ARE INDEPENDENT AND ADDITIVE FOR THE THREE ADVERSE CONDITIONS and
  
• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES ALL THE TIME

Hypotheses -

• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES AND THE EFFECTS ARE EQUAL AND ADDITIVE FOR THE THREE ADVERSE CONDITIONS and
  
• REAR WINDOW DEFOGGERS REDUCE RELEVANT CRASHES ALL THE TIME

Conclusions

Appendix A