U.S. Route 331 is a spur of U.S. Route 31. It currently runs for 150 miles (240 km) from Santa Rosa Beach, Florida east of Fort Walton Beach at US 98 to Montgomery, Alabama at US 80 and US 82. Unlike US 131, US 231, and US 431, US 331 never intersects with its "parent" route, US 31; however, the two routes do come within 4 miles (6.4 km) of each other in Montgomery.
State Road 100 is a 153-mile-long (246 km) east–west highway serving northeast Florida. Its western terminus is at the Georgia-Florida border four miles (6.4 km) north of Avoca, Florida ; its eastern terminus is an intersection with Shore Scenic Highway in Flagler Beach. The portion west of Lake City is only signed as portions of US 41 and US 129, both of which run north–south.
State Road 12 (SR 12) is an east–west route in the Florida Panhandle, running from SR 20 in Bristol to U.S. Route 27 (US 27) in Havana.
U.S. Route 29 (US 29), internally designated by the Alabama Department of Transportation (ALDOT) as State Route 15 (SR 15), is a southwest–northeast state highway across the southeastern part of the U.S. state of Alabama. US 29 and SR 15 traverse Alabama in a general northeast–southwest slope. It has never been a major route in the state; its significance was completely overshadowed with the completion of Interstate 65 (I-65) and I-85 during the 1970s. Today, US 29 and SR 15 serve primarily to connect numerous smaller towns and cities in the southwest, south-central, and eastern parts of Alabama.
State Road 77 is a major north–south artery in Florida's Panhandle, connecting Panama City to the south with Alabama State Route 109 and Dothan, Alabama to the north.
U.S. Highway 29 (US 29) in the state of Florida is the westernmost north–south United States Numbered Highway in the state. It runs 43.6 miles (70.2 km) from downtown Pensacola north to the Alabama state line entirely within Escambia County. US 29 runs as a four-lane highway through much of the Florida Panhandle, becoming six lanes through and near several towns. The highway's hidden state road designation is entirely State Road 95 (SR 95).
U.S. Route 90 (US 90) in the state of Florida is the northernmost east–west United States Numbered Highway in the state. US 90 passes through the county seats of all 15 counties on its course in Florida, and it is also the road upon which many of the county courthouses are located. It is never more than six miles (9.7 km) from Interstate 10 (I-10) throughout the state. It runs as a two-lane highway through most of the sparsely populated inland areas of the Florida Panhandle, widening to four lanes through and near several towns. The speed limit is 55 mph (89 km/h) for all rural points west of Monticello, and it is 60 mph (97 km/h) on all rural points from where it enters Madison County as far as Glen St. Mary.
U.S. Route 221 (US 221) in the U.S. state of Georgia is a south–north U.S. Highway. It travels from the Florida border near the Quitman area to the South Carolina state line, north of Pollards Corner. The highway connects North Central Florida with Upstate South Carolina.
State Road 83 is the state designation for U.S. Route 331 between US 98(SR 30) in Santa Rosa Beach and US 90(SR 10) in DeFuniak Springs. It also includes an independent route from DeFuniak Springs to the Florida-Alabama State Line. The entire route is in Walton County.
State Road 69 is a road running through Calhoun and Jackson counties in northwest Florida. The road is almost entirely two-lanes wide.
U.S. Highway 23 (US 23) in the U.S. state of Georgia is a north–south United States Numbered Highway that travels from the St. Marys River south-southeast of Folkston to the North Carolina state line, in the northern part of Dillard. At nearly 392 miles (631 km) in length, it is the longest U.S. Highway in Georgia.
U.S. Route 129 (US 129) is a 375-mile-long (604 km) U.S. Highway in the U.S. state of Georgia. It travels south-to-north from the Florida state line, south of Statenville, to the North Carolina state line, northwest of Blairsville.
U.S. Route 441 (US 441) in the U.S. state of Georgia is a 354.2-mile-long (570.0 km) north–south United States Highway through the east-central portion of the state. It travels from the Florida state line near the Fargo city area to the North Carolina state line, in the northern part of Dillard. It is a spur route of US 41, although it has no intersections with its "parent" route within the state. It does have an intersection with another spur route of US 41 however, specifically US 341 in McRae–Helena.
State Road 71 is a highway in western Florida that runs 95.4 miles (153.5 km) from the Gulf Coast and the Gulf of Mexico, through the panhandle of Florida to the Alabama border.
State Road 81 is a state highway linking State Road 20 at Bruce with Alabama State Route 87.
State Road 73, the Wayne Mixson State Highway, is a state highway in northwest Florida that runs through Calhoun and Jackson Counties, although it runs through more of the former county than the latter one. The road is always on the west side of the Chipola River, and is almost entirely two-lanes wide, except with its concurrency with US 90 in Marianna where it is four-lanes wide. It was named in honor of former Florida governor Wayne Mixson.
State Road 273 is a north–south highway in the panhandle in the U.S. state of Florida that extends from State Road 77 in Chipley to U.S. Route 231 in Campbellton. SR 273 runs through both Washington and Jackson counties, and most, if not all of the road is a two-lane undivided highway. Between its termini, SR 273 intersects with no state roads other than former ones. A former section of the road south of Chipley is now County Road 273.
State Road 276 is a state road in the panhandle of Florida. It runs west to east from former State Road 167 into U.S. Route 90 in and around Marianna entirely within Jackson County, although a bi-county extension exists between State Road 277 southwest of Chipley in Washington County that runs south then east into CR 167 which is signed as County Road 276 (CR 276). Most of the road is a two-lane undivided highway, with exceptions in the vicinity of Interstate 10, and if you count the bi-county portion, the overlapped segment with U.S. 231 where it changes from a four-lane undivided highway to a four-lane divided highway between Alford and Steele City.
SR 79 in Vernon 
US 90 near Chipley 
