This report presents the guidebook developed to provide bus transit agencies with leading transit industry practices for performing continuous safety and operational improvements in the deployment of battery electric buses. The supporting research report, Procuring and Maintaining Battery Electric Buses and Charging Systems – Best Practices, is a resource for the industry that offers a summary of industry reports highlighting the challenges and opportunities with battery electric bus (BEB) deployments and the outcomes of federally sponsored deployments, existing standards from the American Public Transportation Association (APTA) and the Society of Automotive Engineers (SAE), as examples, and lessons learned through case studies. Additionally, the Safety and Security Certification of Electric Bus Fleets – Industry Best Practices supporting research was conducted to give bus transit agencies helpful information on the requirements of a Safety and Security Certification (SSC) program to verify the unique identified risks that will be introduced to a transit agency as a result of initiating a BEB fleet transition.