Folkston to Callahan

From Folkston (MP 602.5), where the Jesup subdivision trails in from the northwest, there are crossovers (MP 602.2), the Burch Block ends and the Folkston Block starts, a road bridge overhead, and the speed limit is 50 mph through town (MP 602.5 to MP 602.7), where there are three grade crossings, the double track, CTC, main line, with overall speed limit 79/70/60, passes Intermediate Signals, crosses the St. Mary's River into Florida on a through truss bridge, and turns south-southeast, past a dirt road grade crossing, a grade crossing, signals and crossovers at Boulogne (MP 608.3), where the Folkston Block ends and the Hilliard Block starts, detectors at MP 610.6, Intermediate Signals, a grade crossing, a grade crossing in town, Intermediate Signals at Hilliard, two grade crossings, signals and crossovers at South Hilliard (MP 617.2), where the Hilliard Block ends and the Callahan Block starts, a dirt road grade crossing, a road alongside to the east, detectors at MP 619.5, a dirt track grade crossing, Dyal, two grade crossings, a road bridge overhead, and Callahan (MP 624.3), where an erstwhile SAL line once trailed in from the northeast, the Callahan subdivision to Baldwin heads away on the southwest (MP 624.2), with 20 mph speed limit on the turnout to that line, and the main line continues south-southeast.