1. Modeling the Interactive Effects of Safety Countermeasures on Pennsylvania Highways Open Access Author: Shao, Yen-wen Title: Modeling the Interactive Effects of Safety Countermeasures on Pennsylvania Highways Graduate Program: Civil Engineering Keywords: countermeasureinteractioncrash estimationCrash Modification FactorCMFmultiple treatmentssafety effectiveness File: Download Yen-Wen_Shaos_dissertation_Modeling_Interactive_Effects_07242015_final_resubmission.pdf Committee Members: Paul Peter Jovanis, Dissertation Advisor/Co-AdvisorPaul Peter Jovanis, Committee Chair/Co-ChairEric Todd Donnell, Committee MemberMartin T Pietrucha, Committee MemberDennis Kon Jin Lin, Committee Member