1. Compute the benefit cost ratio for adding a turn lane at an intersection on a highway with the following 3-year crash hist Type of Crash PDO Rear-End Right Angle 17 Run Off-Road 10 Fixed Object 10 Animal 10 2. Compute the benefit cost ratio for adding guardrail to a 1 mile stretch of highway with the following 3-year crash hist Type of Crash PDO Rear-End Right Angle Run Off-Road 10 Fixed Object 10 Animal 10 1. Compute the benefit cost ratio for adding a turn lane at an intersection on a highway with the following 3-year crash hist Type of Crash PDO Rear-End Right Angle 17 Run Off-Road 10 Fixed Object 10 Animal 10 2. Compute the benefit cost ratio for adding guardrail to a 1 mile stretch of highway with the following 3-year crash hist Type of Crash PDO Rear-End Right Angle Run Off-Road 10 Fixed Object 10 Animal 10