From the Document: "CDC [Centers for Disease Control and Prevention] created this road travel toolkit for transportation departments and other partners to help reach domestic travelers with COVID-19 [coronavirus disease 2019] prevention messaging during road travel. This toolkit provides messages, graphics and products to:  Support timely messaging to those traveling by road in the United States.  Share CDC resources and content with transportation partners.  Help transportation partners develop further COVID-19 materials."
Centers for Disease Control and Prevention: https://www.cdc.gov/