sentences:  Ultimately these types of roads became state highways or nice quality roads, but the importance of their beginnings is that they began as rural back-roads for agricultural purposes.Backroads are less safe than other roads, with much higher fatality rates.A 2015 study by TRIP (a national transportation research group) in the United States found that backroads have a traffic fatality rate of 2.18 deaths per 100 million vehicle miles traveled, while the average across all US roads is 0.38.