Miami-Dade Expressway Authority
3790 NW 21 Street
Miami, Florida 33142
Phone (305) 637-3277
Fax (305) 637-2537
History of MDX
The Miami-Dade Expressway Authority was created in December 1994 by the Miami-Dade County Commission to establish local control of toll revenues and to ease traffic congestion on five major expressways in South Florida. With the passage of Florida legislation in December 1996, MDX took over operational and financial control of five of South Florida's busiest roadways:
MDX's five roadways cover more than 31 center-lane miles and are the most critical east-west roadways in the county.
Paving the Way for Miami-Dade's Expressways
Since becoming operational in January 1997, MDX has been tasked with maintaining, operating and enhancing its expressway system with the funding generated from tolls collected on its roadways. MDX does not receive money from gasoline taxes or other tax revenues; in fact more than 95% of its revenue comes from the tolls collected on four expressways. Under MDX's charter all tolls are fully dedicated to transportation enhancement projects in Miami-Dade County.
In the past ten years, MDX has:
- Over $170 million invested in completed projects and another $410 million in ongoing projects;
- Contributed over $300 million in joint construction projects with other state and local governmental agencies;
- Resurfaced most of the MDX System;
- Performed system-wide bridge upgrades;
