TRB's Airport Cooperative Research Program (ACRP) Report 146: Commercial Ground Transportation at Airports: Best Practices covers best management practices to ensure the provision of safe, comfortable, easy-to-use, and efficient commercial ground transportation service. Commercial ground transportation services include taxicabs, limousines, shared-ride services, transportation network companies, courtesy vehicles, buses, and vans. The guidebook reviews the ground transportation industry, potential solutions to challenges airport operators frequently face, how to select a solution, and how to implement the selected best practice. Foreword -- Chapter 1. Overview of the guidebook -- chapter 2. Establishing goals and policies for the airport's ground transportation program -- chapter 3. Expectations of customers, airport management, providers, and other stakeholders -- chapter 4. Operations of commercial ground transportation in general -- chapter 5. Operations of commercial ground transportation at airports -- chapter 6. Regulation and enforcement of commercial ground transportation services on airports -- chapter 7. Role of small and disadvantage business enterprises -- chapter 8. Examples of best practices -- chapter 9. Supporting technologies -- chapter 10. Selling and implementing the solution -- appendix A. Acronyms -- appendix B. Glossary -- appendices C through H.