Airport Expressway SR 112 begins at the main entrance of
Miami International Airport, at the intersection of NW 21st Street and
State Road 953 (Le Jeune Road), and heads north. From here until the interchange with
I-95, the road is known as the Airport Expressway and is maintained by the
Greater Miami Expressway Agency (GMX). For its first mile or so, the road runs parallel to SR 953 and an airport runway, with its lanes featuring a divided
left-hand driving direction. About 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, which also provides limited access to
U.S. Route 27. After crossing NW 37th Avenue, the Airport Expressway passes through its first of two toll gantries, charging $0.35 for vehicles with
SunPass transponders and $0.70 for the remaining Toll-by-Plate users. It also 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, the expressway passes through the second toll gantry (at the location of the former toll plaza), charging the same rates as the first gantry. Near this gantry, 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 another 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. About later, the Airport Expressway ends at the
stack interchange with
I-95 (alternatively known as the 36th Street Interchange), with SR 112 and the pavement continuing eastwards as
Interstate 195.
I-195 The 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 way of the
Julia Tuttle Causeway. At
SR 907A (Alton Road), I-195 terminates while SR 112 continues east as Arthur Godfrey Road.
Surface section East of Alton Road, SR 112 continues as the palm-lined
Arthur Godfrey Road (also known as West 41st Street), a four-lane surface road. It passes through the southern end of
Nautilus, past shops and low-rise office buildings, crossing the
Biscayne Waterway before passing along the southern edge of North Beach Elementary School. Continuing past more shops and a hotel, SR 112 crosses the
Intracoastal Waterway before immediately meeting the southbound half of
SR A1A. Past here, the road becomes one lane in each direction and meets the northbound half of SR A1A one block later, terminating amidst the high-rises of
Mid-Beach. 41st Street continues on a short distance into a
cul-de-sac. ==Tolls==