The section of US 9 between US 113 and DE 1 serves as part of a primary hurricane evacuation route from the Delaware Beaches to points inland while the section of US 9 between US 13 and US 113 serves as part of a secondary hurricane evacuation route from the coastal areas. Sections of US 9 in Delaware are part of the Delaware Byways system. The portion of the route between DE 5 in Harbeson and DE 1 in Five Points is designated as part of the Delaware's Bayshore Byway. The portions of the route between DE 1 and Kings Highway and US 9 Bus. and the Cape May–Lewes Ferry terminal in Lewes are designated as part of the Historic Lewes Byway, Gateway to the Bayshore.