existing railroad line is a CSX line once owned by the Seaboard Air Line Railroad that was used by Amtrak's Sunset Limited until 2005, when the service was truncated to New Orleans by Hurricane Katrina. No Amtrak trains stopped anywhere in Jefferson County. Major highways Interstate 10 is the main west-to-east interstate highway in the county, and serves as the unofficial dividing line between northern and southern Jefferson County. It contains three interchanges within the county; the first being SR 59 in Lloyd (Exit 217), the second at US 19 in Drifton (Exit 225), and the third south of Aucilla at CR 257 (Exit 233). Beyond this point I-10 runs through Madison County. US 19 is the westernmost north-south US highway in the county. It enters from southwestern Madison County as the Georgia-Florida Parkway in a concurrency with US 27, then breaks away from US 27 in Capps to run straight north through Monticello where it encounters a traffic circle with US 90 around the historic Monticello Courthouse. North of the city it runs through the State of Georgia. US 27 is another north-south US highway in the county. It enters from Madison County in a concurrency with US 19, but unlike US 19 breaks away at Capps and runs west toward Tallahassee SR 59 is the westernmost north–south highway in Jefferson County and is the only roadway connection between U.S. 90 (at its intersection in Leon County) to the southernmost east–west route through Jefferson County, U.S. Route 98. US 90 was the main west-to-east highway in the county, until it was surpassed by I-10. It enters the county from Leon County twice, the second time from a causeway over the southern end of Lake Miccosukee, and eventually enters Monticello in a traffic circle with US 19. East of the city, it curves southeast through rural Jefferson County, then passes north of Aucilla before crossing the Madison County Line at a bridge over the Aucilla River. US 98 is the southernmost east–west route running through the Conservation Areas of the Gulf of Mexico from Wakulla to Taylor Counties. The sole major intersection is with SR 59. US 221 is the easternmost US highway in the county, running south and north through the northeastern portion of Jefferson County, including Ashville before crossing the Georgia State Line. Communities City Monticello Census-designated places Aucilla Lamont Lloyd Wacissa Waukeenah Other unincorporated communities Alma Ashville