The Midtown Interchange, located in the Civic Center

Civic Center (Miami)

Civic Center is a neighborhood in the city of Miami, Florida USA. The Civic Center is bound roughly by Northwest 20th Street and 14th Avenue to the northwest, the Dolphin Expressway and the Miami River to the south and west, and the Midtown Interchange and I-95 to the east.The Civic Center has the...

 neighborhood of Miami, Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

, USA, is the convergence of three major motorways: I-95

Interstate 95 in Florida

Interstate 95 is the main Interstate Highway on the east coast of the United States; it serves the Atlantic coast of Florida. It begins at a partial interchange with U.S. Highway 1 just south of downtown Miami, and heads north past Daytona Beach and Jacksonville to the Georgia state line at the St...

, I-395

Interstate 395 (Florida)

Interstate 395 is a long, elevated Interstate Highway that connects Interstate 95 in the west with the MacArthur Causeway in the east in the Miami area via the Midtown Interchange...

 (which connects to the MacArthur Causeway

MacArthur Causeway

The General Douglas MacArthur Causeway is a six-lane causeway which connects Downtown, Miami, Florida and South Beach, Miami Beach via Biscayne Bay....

 to the east), and the Dolphin Expressway (SR 836).

Since its opening in 1968, eight lanes have been added to I-95 and a undersea tunnel

Undersea tunnel

An undersea tunnel is a tunnel which is partly or wholly constructed under a body of water. They are often used where building a bridge or operating a ferry link is impossible, or to provide competition for existing bridges or ferry links...

 below Biscayne Bay

Biscayne Bay

Biscayne Bay is a lagoon that is approximately 35 miles long and up to 8 miles wide located on the Atlantic coast of South Florida, United States. It is usually divided for purposes of discussion and analysis into three parts: North Bay, Central Bay, and South Bay. Its area is...

 is currently under construction

Miami port tunnel

The Port of Miami Tunnel is a major construction project in Miami, Florida, with an estimated cost of 1 billion US dollars. The project includes a 3/4 mile long split portal automotive traffic tunnel connecting the MacArthur Causeway on Watson Island and the Port of Miami on Dodge Island, as well...

 from the end of I-395 near Bicentennial Park

Bicentennial Park (Miami)

Bicentennial Park is a public, urban park in downtown Miami, Florida. The park opened in 1976 on the site of several slips served by the Seaboard Air Line Railroad. It was named "Bicentennial Park" to celebrate the bicentennial of the United States in that same year...

. The tunnel will serve as a direct freeway connection to the Port of Miami

Port of Miami

The Dante B. Fascell Port of Miami is a seaport located in Biscayne Bay in Miami, Florida, United States. It is connected to Downtown Miami by Port Boulevard, a bridge over the Intracoastal Waterway. The port is located on Dodge Island, which is the combination of three historic islands that have...

, expected to alleviate freight traffic in Downtown Miami

Downtown Miami

Downtown Miami is an urban residential neighborhood, and the central business district of Miami, Miami-Dade County, and South Florida in the United States...

.