The guidance and best practices are designed to aid transit agencies. They outline the elements agencies might choose to follow. Transit agencies should determine the applicability of the various guidance and recommendations based on their own system and community, and on their requirements, plans and policies. Transit agencies should note that in some cases, federal and/or state regulations govern portions of a transit system’s operations, and those regulations take precedence over the best-practice guidelines. The guidance and best practices are not a comprehensive list of actions to take after a pandemic viral outbreak.