also part of US 23 as well as US 301, the northern terminus of Florida State Road A1A and Florida State Road 200. US Routes 1 and 23 run together northbound in an overlap from the Grand Park section of Northwest Jacksonville through the St. Mary's River. US 301 joins US 1 and 23 from an overlap with hidden State Road 200, that begins as far south as Ocala. SR 200 itself joins a wrong way concurrency with SR A1A into Fernandina Beach. Florida State Road 115 runs from the Deercreek section of Southeast Jacksonville and terminates with US 1 and 23 south of downtown, but contains a de facto extension at the northern edges of town in the form of CR 115 on Kings Road and Old Dixie Highway. CR 108 is known as North Brandies Avenue then becomes Saint George Road as it loops around western Nassau County then curves to the east while passing through Hillard where it runs through another intersection with US 1, 23 and 301. The road continues east through northern rural Nassau County briefly passing through Evergreen, and finally terminates at US 17 north of Becker. Railroads Two railroad lines exist within Callahan; The CSX Nahunta Subdivision, a former Atlantic Coast Line Railroad line which runs from the Jacksonville Terminal Subdivision in Jacksonville to the Savannah Subdivision in Savannah, Georgia, and the CSX Callahan Subdivision. a former Seaboard Air Line Railroad line which runs south to a junction in Baldwin that includes the Wildwood Subdivision the former Tallahassee Subdivision and another leg of the Jacksonville Terminal Subdivision. Two former SAL lines that extended from the Callahan Subdivision were an abandoned segment of the Fernandina Subdivision and the Gross Cutoff. Infrastructure Nassau County Fire Rescue operates Station 50 in Callahan. Notable people Howie Kendrick, Major League Baseball player for the Anaheim Angels, Los Angeles Dodgers and Washington Nationals Frank Murphy, former NFL player for the Chicago Bears, Tampa Bay Buccaneers and Houston Texans References Towns in Nassau County, Florida Towns in the Jacksonville metropolitan area