State Road 112 (Florida)

State Road 112 (Florida)
State	FL
Type	SR
Route	112
Length mi	9.8
Direction a	West
Terminus a	I-95 in Miami
Junction	I-195 in Miami Beach
Direction b	East
Terminus b	Miami Beach Boulevard in Miami Beach
Counties	Miami-Dade County

State Road 112 (Florida) is an east–west state highway on the Florida southeastern Atlantic corridor serving the Miami metropolitan area, including Miami International Airport, Miami Beach, and the Port of Miami. The route incorporates the Airport Expressway and the Julia Tuttle Causeway corridor, linking I-95, SR A1A, and major urban nodes such as Downtown Miami, South Beach, and the Design District. It functions as both a commuter arterial and an access route for freight, tourism, and air passengers.

Route description

State Road 112 begins at a junction with I-95 near Miami International Airport, proceeding east as the tolled Airport Expressway through sections adjacent to LeJeune Road, West Flagler Street, and the Doral-oriented commercial districts. The expressway passes north of Miami International Mall and south of Northwest 36th Street before connecting to ramps serving SR 953 (Le Jeune Road), SR 821, and access roads to Miami Springs and Hialeah. Crossing the Miami River and traversing the Edgewater vicinity, the route links with I-195/Julia Tuttle Causeway which spans Biscayne Bay to Miami Beach via an alignment that interfaces with SR A1A and local arterials such as Collins Avenue and Washington Avenue. Along the corridor, interchanges provide access to Brickell, Little Havana, and the Wynwood arts district through connector ramps and surface street ties to US 1.

History

The Airport Expressway segment originated as a mid-20th century project intended to improve access between Miami International Airport and central Miami. Early plans involved coordination among the Florida Department of Transportation, Dade County authorities, and federal agencies, reflecting postwar growth similar to infrastructure expansions seen during the eras of Interstate Highway System development and the Federal-Aid Highway Act of 1956. Construction phases paralleled other regional projects such as the development of I-95 and the causeway improvements exemplified by MacArthur Causeway. The Julia Tuttle Causeway portion traces its name to Julia Tuttle, a founder of Miami, and saw successive rehabilitation projects to accommodate rising vehicle volumes tied to tourism booms associated with South Beach and cruise terminal expansions at the Port of Miami. Tolling policies evolved under influences from Florida Turnpike Enterprise, local bond financing, and legal frameworks similar to cases involving public–private partnership models in other Florida corridors.

Major intersections

The corridor connects with numerous regional routes and interstates, including: I-95 near Downtown Miami; SR 953 (Le Jeune Road) providing airport access; SR 821 toward western suburbs such as Doral and Kendall; US 1 serving Coconut Grove and Coral Gables; I-195 transferring traffic to Miami Beach and SR A1A; and multiple surface street interchanges on Collins Avenue and Washington Avenue near the Cruise Port of Miami and PortMiami. These interchanges integrate with arterial networks that feed into neighborhoods like Little Haiti, Midtown Miami, and Edgewater.

Tolls and traffic management

Toll collection on the Airport Expressway and Julia Tuttle Causeway uses electronic tolling systems compatible with statewide transponders such as SunPass and interoperable programs similar to E-ZPass arrangements pursued in multistate initiatives. Toll rates fluctuate by vehicle class, time of day, and occasionally by congestion pricing pilot frameworks echoed in other metropolitan areas like New York City and Los Angeles County. Traffic management employs intelligent transportation systems integrated with Florida Department of Transportation traffic operations centers, traffic cameras, and dynamic message signs modeled after deployments on facilities adjacent to I-95 and Florida's Turnpike. Incident response coordination often involves Miami-Dade Police Department, Florida Highway Patrol, and municipal traffic units.

Public transport and transit connections

SR 112 interfaces with multimodal services including bus routes operated by Miami-Dade Transit, shuttles to Miami International Airport, and connections to rail services such as the Metrorail and Metromover people mover in Downtown Miami and Brickell. Park-and-ride and airport rental car facilities link to express bus corridors similar to networks in other coastal metros like San Diego and Seattle. Proposals for expanded bus rapid transit and improved first-mile/last-mile integration draw on precedents from Los Angeles Metro and MBTA projects.

Future plans and improvements

Ongoing and proposed improvements include capacity upgrades, interchange reconfigurations, and resilience projects addressing sea-level rise and storm surge impacts similar to adaptation measures implemented in Miami Beach and Everglades National Park planning. Studies sponsored by the Florida Department of Transportation consider automated tolling enhancements, expanded transit priority lanes, and multimodal mobility hubs to connect with regional plans from entities such as Miami-Dade County planning agencies and federal grant programs. Potential coordination with private investment and federal infrastructure funding initiatives mirrors approaches used in other major corridors like I-95 Northeast Corridor upgrades.

Category:State highways in Miami-Dade County, Florida