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State Road A1A (SR A1A) is a north-south Florida State Road that runs mostly along the Atlantic Ocean, with sections from Key West at the southern tip of Florida, to Fernandina Beach, just south of Georgia on Amelia Island. It is the main road through most oceanfront towns. Part of SR A1A is designated the A1A Scenic and Historic Coastal Byway, a National Scenic Byway. A portion of A1A that passes through Volusia County is designated the Ormond Scenic Loop and Trail, a Florida Scenic Highway. It is also called the Indian River Lagoon Scenic Highway from State Road 510 at Wabasso Beach to U.S. Route 1 in Cocoa. The designation is unique: other than SR A1A Alternate (now SR 811, CR 707, SR 732, and an extension of SR 842), only two other Florida state roads have begun with a letter: SR A19A (now a loop of SR 693-SR 699-SR 682 near St. Petersburg), and SR G1A (now SR 300). The road was assigned the number 1 in the 1945 renumbering, mostly replacing the former State Road 140 designation. The number reflected its location in the new grid as the easternmost major north–south road. About a year and a half later, in November 1946, the State Road Board resolved to renumber the route due to confusion with the parallel U.S. Highway 1. The new designation, A1A, was chosen to keep the number 1 in its place in the grid.〔Eliot Kleinberg, (Effort To Prevent Confusion Gave State Road A1A Its Name ), Post Time (The Palm Beach Post), July 25, 2001〕〔〔〔 ==Route description== SR A1A is heavily associated with Florida beach culture and is known for its lush tropical and subtropical scenery and ocean vistas. In many places, the highway runs directly along the waterfront of the Atlantic Ocean, but in other places, it runs one to five blocks inland from the beachfront. For most of its length, A1A runs along Florida's East Coast Barrier Islands, separated from the mainland of the state by the Intracoastal Waterway. Because of the proximity of the highway to the ocean and its susceptibility to storm surges, sections of A1A are often closed or damaged by hurricanes and tropical storms. A1A also has been a backbone of Florida's Spring Break serving as "the strip" in both Fort Lauderdale – a popular spring break destination during the 1960s, 1970s, and 1980s – and Daytona Beach, which became a popular destination for college spring breaks during the 1970s. The southern terminus of SR A1A is at the southern end of Bertha Street, where SR A1A begins as a two-lane, then a four-lane highway along the Straits of Florida in Key West, known locally as South Roosevelt Boulevard. The road heads east past East Martello Tower and Key West International Airport, before curving north with an intersection with CR 5A (Flagler Avenue), followed by the northern terminus of the Key West section of SR A1A, U.S. Route 1 and State Road 5 (the Overseas Highway). Running along the south shore of Key West, SR A1A is the southmost numbered highway in the lower 48 states. SR A1A reappears at Interstate 395 and US 1 in Miami, beginning at MacArthur Causeway before becoming Collins Avenue at Fifth Street in Miami Beach (or, in small segments, Harding Avenue, Abbott Avenue, or Indian Creek Drive), serving as one of Miami Beach's main north — south thoroughfares. Just north in the town of Surfside, the northbound is Collins Avenue, and the southbound is Harding Avenue. In Bal Harbour it is called Bal Harbour Boulevard. In Golden Beach it is called Ocean Boulevard. It serves Hallendale Beach, Hollywood Beach, and Dania Beach. It joins with US 1 for 3.4 miles, and passes the Ft. Lauderdale/Hollywood International Airport. It then divides and serves Ft. Lauderdale Beach, Pompano Beach, and continuing north. It serves as the main road throughout much of the exclusive Palm Beach, further to the north. In the area of Vero Beach, A1A is called the Robert C. Spillman Memorial Highway, and it spans Sebastian Inlet at the Sebastian Inlet Bridge. A1A next passes just to the west of Cape Canaveral and the John F. Kennedy Space Center. Two miles of A1A were used as part of the well-known Daytona Beach Road Course. A1A also passes through St. Augustine, the oldest continuously-inhabited city on the mainland of the United States. A1A is called 3rd Street in Jacksonville Beach and Neptune Beach. Just south of Atlantic Beach, A1A turns inland for several blocks, following Atlantic blvd, before resuming a northward course along Mayport Road that ends at the St. Johns River. A ferry takes traffic to the northern section of A1A that continues along the coast to just south of Fort Clinch State Park on the estuary of the Saint Mary's River. At that point A1A hooks back south to Fernandina Beach and then turns west, going inland 20 miles through Yulee and crossing I-95 and U.S. Highway 17. It ends at U.S. Highway 1, U.S. Highway 23, and U.S. Highway 301 in Callahan, Florida. This section west of Fernandina Beach, is also marked as SR 200, but SR A1A signs are displayed at every cluster of signs, though a designated direction is only above the SR 200 signs. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Florida State Road A1A」の詳細全文を読む スポンサード リンク
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