Secondary highways are also known as 'state routes' or 'county roads'. These roads are not as heavily traveled as highways, but are still important for commuters and travelers. Some synonyms for secondary highways include rural roads, back roads, and minor roads. Other terms that can be used to describe these types of roads include byways, country lanes, and scenic routes. Some regions may also refer to these roads as farm-to-market roads or state highways. Regardless of what they are called, secondary highways provide an essential function for those who need to get to their destination through less-traveled roads.