Miami-Dade Expressway Authority - Markings

Markings

All MDX highways use the shield-shaped signs reserved by FDOT for toll roads, with the MDX logo (see above) attached below the "shield". Along a portion of a MDX route where no tolls are ahead, the TOLL in the green section of the TOLL shield is removed. In addition, all MDX highways use a uniquely designed mileage marker. Instead of the green "MILE XX" markers commonly seen on interstate highways, the five MDX expressways use blue mileage markers featuring (from top to bottom, in white): a single letter indicating the direction of travel, the State Road designation of the highway (complete with outline of the State of Florida), and two numbers separated by a horizontal line ("2" on the top, "4" on the bottom of the line represents Mile Marker 2.4 from either the southern or western end of the expressway). These markers are placed on the edge of the shoulder every 0.2 miles along the expressway. The Gratigny Expressway has two of these (Mile Markers 5.0 and 5.2) on a surface street near Opa-Locka on Northwest 119th Street just east of the end of its easternmost ramp).