States use a variety of Law Enforcement Liaison (LEL) network models. This project will conduct an online survey of State LEL programs to identify program characteristics, costs, and State-recommended program practices. Optional tasks include possible case studies of LEL programs and a possible cost-effectiveness analysis of State LEL programs. The goal of this project is to improve the National Highway Traffic Safety Administration (NHTSA) understanding of LEL programs in the United States and to evaluate the programmatic and cost effectiveness of existing LEL program approaches. Study outcomes are intended to inform funding agencies and LEL programs about what is required to maintain maximum LEL program effectiveness.