Wildlife crossings and enhancements are often integrated into transportation projects and are becoming a larger aspect with long-term mitigation planning for many state DOTs and transportation agencies. There are unknowns regarding methods to calculating the values of connected habitats, improvements to wildlife permeability, and mitigation crediting with certain types of wildlife enhancements on highways. This research task would collect information and present the body of knowledge regarding habitat valuing methods, metrics and criteria for credit development, and project crediting mechanisms for wildlife connectivity improvements.