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The Homestead Extension of Florida's Turnpike (HEFT), designated as the Ronald Reagan Turnpike and originally known as the West Dade Expressway, is a north–south free-flow toll road southern extension of the similarly tolled Florida's Turnpike. The expressway runs around the west and north sides of the Greater Miami area, extending from U.S. Route 1 in Florida City (near Homestead) to the Turnpike mainline four miles north of the Golden Glades Interchange. The road carries the hidden designation of State Road 821 (SR 821). It was opened in stages between 1973 and 1974, after the main line of the Turnpike was completed, and is used by both commuters and travelers to the Florida Keys and Everglades National Park. Due to its path, it acts as a de facto outer beltway for Miami. Unlike other Florida's Turnpike Enterprise highways, it is treated as if it were part of Florida's Turnpike mainline by highway signs and exit numbers, despite its separate state road number. ==Route description== The road begins at a partial interchange with US 1 in Florida City next to the Florida Keys Outlet Center, where the road heads northeast as a four lane expressway. Travelers to here from the northern parts of the Turnpike Extension can continue south along US 1 to the Florida Keys or the Everglades National Park (via SR 9336).〔 This point also marks the beginning of the HEFT's hidden designation of State Road 821.〔〔 Between Florida City and Cutler Bay, the HEFT acts as a bypass for the communities along US 1.〔 The first 16 miles of the tollway are located within mostly new residential developments that were constructed after Hurricane Andrew, which destroyed most of the area in 1992. Some farms line the rest of this stretch. The first interchange northbound is Campbell Drive / Southwest 312th Street in Homestead, which allows travelers to access the Homestead Hospital and the Homestead-Miami Speedway. The Turnpike then has an exit with Southwest 288th Street at mile 5, providing a connection to the Homestead Air Reserve Base, before leaving Homestead and entering parts of unincorporated Miami-Dade County. At mile 6, the tollway has a southbound exit and northbound entry for Southwest 137th Avenue, with the HEFT heading east-northeast until the exit with SR 989 (Allapattah Road / Southwest 112th Avenue) at mile 9. The road then curves to a northerly direction towards the Homestead Toll Gantry, the first of four on the route, at mile 10. It then enters Cutler Bay, where the highway is also known as the John F. Cosgrove Highway for the next five miles.〔 The first exit in Cutler Bay is with Southwest 216th Street/Cutler Ridge Blvd at mile 11, followed by another at Caribbean Blvd at mile 12. Following exit 11, the turnpike widens to six lanes. The tollway then crosses back over US 1 at the Southland Mall and leaves Cutler Bay. Continuing north, the HEFT serves SR 994 (Quail Roost Drive) at exit 13 and gains another lane in each direction. This is followed by SR 992 (Coral Reef Drive (Southwest 152nd Street)) at exit 16, which marks the northern terminus of the John F. Cosgrove Highway.〔〔〔〔 The tollway passes through older, predominantly residential areas for the next ten miles. Between exits 16 and 17, the T swells to ten lanes; this section of the tollway also has the highest traffic count at 172,000 vehicles per day (as of 2014).〔 Past exit 17, where SR 874 (Don Shula Expressway) leaves the HEFT to connect to SR 826 (Palmetto Expressway), the tollway drops back to six lanes and soon reaches an interchange with Southwest 120th Street at mile 19. Just north of the Southwest 120th Street exit, still at mile 19, lies the Snapper Creek Service plaza, which is located on the center median with access from both directions and is the only plaza on the extension; unlike the more robust services along the mainline, it only offers a convenience store inside the gas station. The next exit is with SR 94 (Kendall Drive), followed by the Bird Road Toll Gantry at mile 23; from here, the HEFT takes a beeline path north for the next ten miles. The next exit is with SR 976 (Southwest 40th Street), after which the HEFT gains two extra lanes in preparation for the next two exits. After the tollway forms the western end of the Florida International University campus, it meets the Tamiami Trail (US 41) at exit 25, and then SR 836 (Dolphin Expressway) at exit 26 in Fontainebleau, which provides access to Miami International Airport eastbound.〔〔 North of this interchange, the Turnpike Extension enters a stretch where it forms the border between undeveloped Miami-Dade County to the west and residential developments to the east for the rest of its journey in the county, its width varying between six and eight lanes, with exits at Northwest 12th Street at mile 26, Northwest 41st Street at mile 29, and at Northwest 74th Street at mile 31. Half a mile north of Northwest 74th Street lies the Okeechobee Toll gantry, with the HEFT then intersecting Northwest 106th Street/Beacon Station Boulevard at mile 34. The tollway starts to curve in a north-easterly direction and comes to exit 35 with US 27. Afterwards, the expressway fully enters an undeveloped portion of Miami-Dade County until the next exit at I-75 northbound at exit 39, which is a northbound only exit, with the southbound direction of the Turnpike Extension receiving some traffic from I-75 south.〔 North of the I-75 interchange, the HEFT becomes a four-laned highway again. It crosses the Broward County line, entering the suburban community of Miramar, and then curves eastward. The expressway has an interchange with SR 823 (Red Road) at exit 43, after which the Turnpike Extension is just one block north of the Miami-Dade County line for the remainder of the tollway's length. Residential and commercial developments line both sides of the HEFT through here. The next exit is with SR 817 (University Drive) at exit 46, allowing access to Sun Life Stadium and the Calder Race Course. The Miramar Toll gantry then follows the interchange before the Turnpike Extension ends four miles north of the Golden Glades Interchange at the mainline of Florida's Turnpike.〔〔〔 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「Homestead Extension of Florida's Turnpike」の詳細全文を読む スポンサード リンク
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