Florida State Road 112
||This article needs additional citations for verification. (October 2007)|
|Maintained by MDX and FDOT|
|Length:||9.86 mi (15.87 km)|
|Existed:||December 23, 1961 – present|
|West end:||Miami International Airport in Miami|
| I-95 / SR 9A in Miami
US 1 / SR 5 in Miami
|East end:||SR A1A in Miami Beach|
State Road 112 is an east–west state highway connecting Miami International Airport in Miami to Miami Beach in the U.S. state of Florida. Between the airport and Interstate 95, it is locally known as the Airport Expressway. Between Interstate 95 and Alton Road (SR 907A) in Miami Beach, SR 112 is signed only as Interstate 195 as it crosses Biscayne Bay on the Julia Tuttle Causeway. Between I-195 and its eastern terminus at Collins Avenue (SR A1A), the SR 112 signs are present but infrequent.
Route description 
Airport Expressway 
State Road 112 begins at the main entrance of Miami International Airport, at the intersection of NW 21st Street and State Road 953, and heads north. From here until the interchange with I-95, the road is known as the Airport Expressway and is maintained by the Miami-Dade Expressway Authority. For its first mile or so, the road runs adjacent to SR 953 to its west of SR 953, with its lanes featuring a divided left-hand driving direction. About half a mile north of the southern terminus, SR 112 features an at grade railroad crossing, near the eastern end of one of the airport's runways. The road swings to its main east-west orientation past the airport, with its lanes crossing to a normal driving direction just to the east of its partial interchange with SR 948; this interchange also provides limited access to US 27.
After crossing NW 37th Avenue, the Airport Expressway runs roughly parallel to the Metrorail Orange Line, crossing under it just west of NW 32nd Avenue. SR 112 then interchanges with SR 9 (NW 27th Avenue), and then NW 22nd Avenue half a mile later. From here, eastbound automobile traffic is charged a $1.25 toll ($1.00 with SunPass); no toll is paid by westbound travellers. It is also just past here that SR 112 passes the southern side of the Earlington Heights Metrorail station, where the two lines of the Metrorail system merge, with both the Airport Expressway and the Metro continuing to run parallel eastwards for the next mile or so. Just before SR 112's partial interchange with SR 933 (NW 12th Avenue), the Metrorail tracks cross over the Airport Expressway as they curve southwards. Half a mile later, the Airport Expressway ends at the stack interchange with Interstate 95, with SR 112 and the pavement continuing eastwards as Interstate 195.
The 4.91 mile (7.90 km) section of SR 112 connecting Interstate 95 in the west with Miami Beach in the east is also designated as I-195. This portion of the route is signed as I-195, with SR 112 becoming an unsigned highway. I-195 and SR 112 cross Biscayne Bay by traveling over the Julia Tuttle Causeway. Past Alton Road (SR 907), I-195 terminates while SR 112 continues east as Arthur Godfrey Road.
At-grade section 
East of Interstate 195, State Road 112 continues as the palm-lined Arthur Godfrey Drive (also known as West 41st Street), an undivided 0.82-mile-long (1.32 km) four-lane road. It passes through the southern end of Nautilus, past shops and low-rise office buildings, crossing a canal before passing along the southern edge of North Beach Elementary School. Continuing past more shops and a hotel, SR 112 crosses another canal before immediately meeting the southbound half of SR A1A. Past here, the road becomes one land in each direction and meets the northbound half of SR A1A one block later, terminating amidst the high-rises of Mid-Beach Miami Beach. 41st Street continues on a short distance into a cul-de-sac. 
Construction of SR 112 began in 1959, and the expressway was opened to traffic on December 23, 1961 (six months after the Palmetto Expressway, SR 826). Its initial name was the 36th Street Tollway, but use of the name eventually faded in favor of the more popular Airport Expressway. Initially the toll road had its western terminus at the congested intersection with LeJeune Road (SR 953), Northwest 36th Street (SR 948), and Okeechobee Road (US 27/SR 25) just east of the airport.
The westbound toll booths were removed in March 1984.
In 1990, SR 112 was extended southward and westward onto the airport property, ending at the airport's main entrance.
The numbering of SR 112 is an anomaly in the current grid-based system. The road was assigned its number while it was in its planning stages; it retained the number as FDOT made widespread changes in the numbering of State Roads in southeastern Florida in the 1970s and early 1980s.
Spur Interstate 195 
On December 23, 1961, three signed roads along the route of SR 112 were opened: the 36th Street Tollway (now the Airport Expressway), Interstate 195, and Spur Interstate 195. Spur Interstate 195 was the surface portion of the east–west state route along Arthur Godfrey Boulevard in Miami Beach, connecting I-195's eastern terminus to SR A1A. The Spur I-195 signs disappeared from the road shortly after the designation was decommissioned by the newly formed United States Department of Transportation in the late 1960s, and is now signed solely as SR 112.
While repeated attempts to secure funding for extending SR 112 along SR 948 to the Palmetto Expressway and the Homestead Extension of Florida's Turnpike have failed, the Florida Department of Transportation is constructing a connector between the Dolphin Expressway and the Airport Expressway as part of a massive project (the Miami Intermodal Center) tying together expressways, rail lines, and the airport. It remains to be seen if the connector will have its own FDOT designation or if the SR 112 will be extended over it to connect the Miami area's two primary east–west expressways.
Exit list 
The entire route is in Miami-Dade County.
|Miami||0.000||0.000||Miami International Airport||Western terminus|
|0.000||0.000||SR 953 (NW 42nd Avenue)||Eastbound exit and westbound entrance|
|0.901||1.450||SR 953 south (NW 42nd Avenue)||Westbound exit and eastbound entrance|
|1.013||1.630||SR 948 west (NW 36th Street)||Westbound exit and eastbound entrance|
|1.683||2.709||US 27 (East Okeechobee Road / SR 25)||Westbound exit only|
|2.464||3.965||SR 9 (NW 27th Avenue)|
|2.982||4.799||NW 22nd Avenue – Earlington Heights Metrorail|
|3.700||5.955||Toll plaza ($1.25 Cash, $1.00 SunPass, eastbound only)|
|3.820||6.148||NW 17th Avenue||Westbound exit and eastbound entrance|
|4.017||6.465||SR 933 (NW 12th Avenue)||Eastbound exit only|
|4.618||7.432||1|| I-95 (SR 9) – Downtown, Fort Lauderdale, Orlando
|Eastern terminus of tolled section (eastbound)
Western terminus of I-195 and concurrency
|5.296||8.523||2A||North Miami Avenue||Eastbound exit and westbound entrance|
|5.669||9.123||2B||US 1 (Biscayne Boulevard)|
|Julia Tuttle Causeway|
|Miami Beach||8.880||14.291||5||SR 907 (Alton Road) – Hospitals, Convention Center||Eastbound exit and westbound entrance|
|9.020||14.516||North Bay Road||Westbound exit only|
|9.04||14.55|| SR 907A (Alton Road)
|Eastern terminus of expressway section of SR 112
Eastern terminus of I-195 and concurrency
|9.860||15.868||SR A1A south (Indian Creek Drive)|
|9.916||15.958||SR A1A north (Collins Avenue)||Eastern terminus|
- MapQuest, Inc. (2009). Map of Florida State Road 112 (Map). http://mapq.st/MhBpi0. Retrieved 2012-07-22.
- Google Inc. Google Maps – map of SR 112, with State Road 112 on the left (Map). Cartography by Google, Inc. http://maps.google.com/?ie=UTF8&z=18&ll=25.801364,-80.264413&spn=0.002333,0.004174&t=k&om=1. Retrieved June 8, 2009.
- "5526 MDX Rate Card 112" (PDF). Miami-Dade Expressway Authority. Retrieved March 1, 2013.
- Google Inc. Google Maps – Florida State Road 112 (Map). Cartography by Google, Inc. http://maps.google.com/maps?saddr=41st+St&daddr=Unknown+road&hl=en&sll=25.796607,-80.262809&sspn=0.009563,0.015514&geocode=FSDhiQEdlmc5-w%3BFXyZiQEdiDY3-w&t=h&mra=ls&z=12. Retrieved July 22, 2012.
- Chardy, Alfonso. "Cash tolls on Miami-Dade expressways will soon be electronic". Miami Herald 23 Mar 2010.
- "Florida Department of Transportation Interchange Report" (PDF). Florida Department of Transportation. 2008-11-24. pp. 10, 14. Retrieved 2009-07-27.