Completed Projects

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MDX State Road 836 Eastbound Auxiliary Lane

An extra travel lane was added in the eastbound direction of SR 836 from NW 57th Avenue/Red Road to NW 42nd Avenue/LeJeune Road. The new auxiliary lane improved traffic flow in the area by eliminating the bottleneck that occurred near NW 57th Avenue.

MDX State Road 874 Northbound Entrance Ramp from SW 88th Street

This project completed in November of 2008, provides commuters with access to northbound SR 874/Don Shula Expressway from SW 88th Street/Kendall Drive where none previously existed. Noise walls were also constructed to help minimize highway noise to homeowners along the existing SR 878/Snapper Creek Expressway ramp.

MDX State Road 836 Eastbound Shoulder Conversion

This innovative project was constructed to improve mobility at one of MDX's most congested areas on the SR 836/Dolphin Expressway eastbound from west of the SR 826/Palmetto Expressway to east of NW 72nd Avenue. At this location, the expressway shoulder was converted into an additional eastbound travel lane.

MDX State Road 836 Extension and Construction of NW 137th Avenue

MDX delivered new mobility to west Miami-Dade County by constructing a new section of SR 836/Dolphin Expressway that extends the popular expressway from Florida's Turnpike to NW 137th Avenue. The 3.1 mile, four-lane extension has provided drivers heading to and from the western suburbs of Miami-Dade County with a more direct connection to central Miami-Dade County.

MDX State Road 836 Extension Improvements and Bi-directional Toll Plaza

This project provided improvements from NW 87th Avenue to NW 107th Avenue, including a bi-directional toll plaza on SR 836/Dolphin Expressway, slightly west of NW 97th Avenue. The new bi-directional toll features both Open Road Tolling and traditional cash collection. With this project, MDX constructed a two mile bike path along westbound SR 836 from NW 87th Avenue to NW 107th Avenue.

MDX State Road 836 addition of auxiliary lanes Eastbound and Westbound from NW 107th Avenue to NW 87th Avenue

This project was one of the first completed by MDX in the fall of 2000, and one of the first to be done as a design-build project. One auxiliary lane was added both eastbound and westbound from NW 107th Avenue to NW 87th Avenue. This improvement provided greater capacity and greater relief at the eastbound off ramp at NW 87th Avenue alleviating traffic congestion for motorists heading north to the West Dade employment center area. The project also added a triple access ramp as opposed to the then existing two lanes.

MDX State Road 836 addition of an auxiliary lane Eastbound from the NW 72nd Avenue ramp to NW 57th Avenue

This project completed in the fall of 2000, added an auxiliary lane eastbound from NW 72nd Avenue ramp to NW 57th Avenue/Red Road. This project was constructed as a design-build project in order to expedite its delivery.

MDX State Road 924 Widening from State Road 826 and NW 57th Avenue

SR 924/Gratigny Parkway was a six-lane expressway except for a portion between the SR 826/Palmetto Expressway on the west and NW 57th Avenue/Red Road on the east. MDX improved this segment by widening it to the six-lane configuration throughout the expressway. This improvement addressed safety and operational efficiency, increased the level of service of the expressway and helped to relieve congestion and traffic bottlenecks. This project was completed in June 2001.

MDX State Road 836 Toll Plaza Reconstruction

This was the first major project undertaken by MDX and it incorporated improvements of one mile of expressway from NW 27th Avenue to NW 17th Avenue and the reconstruction of the toll plaza at NW 17th Avenue. This project, completed in 2003, included the incorporation of SunPass® Express Lanes which allows commuters to go thru the plaza at highway speeds without having to stop or slow down. This was the first element of Open Road Tolling in an urban environment to open in Florida. It improved the capacity of the toll plaza processing capacity by approximately 40 percent, along with improvements to overall roadway geometry and safety.

MDX State Road 112 New Ramp to Okeechobee Road

MDX completed and opened in 2004, a new westbound exit ramp to Okeechobee Road to ease traffic on SR 112/Airport Expressway. It provided an additional auxiliary lane to Okeechobee Road increasing the overall capacity of the ramp and significantly reducing congestion in the area.

MDX State Road 836 Westbound Ramp to Southbound Turnpike

The purpose of the project, completed and opened to the public in 2005, was to provide better access to and from NW 107th Avenue from SR 836/Dolphin Expressway to provide improved connections to both the northbound and southbound Homestead Extension of Florida's Turnpike (HEFT) as well as to function as the mainframe in constructing an extension to SR 836.

MDX State Road 836 Westbound Auxiliary Lane from NW 57th Avenue to State Road 826

This project, started March 2005, was opened to the public in 18 months and included the construction of one auxiliary lane, approximately 1.5 miles long, adjacent to the existing westbound SR 836/Dolphin Expressway from just west of NW 57th Avenue/Red Road to SR 826/Palmetto Expressway. This project was important in improving the gridlock and traffic back-ups on SR 836 between NW 57th Avenue and the SR 826 interchange.

MDX State Road 836 Westbound Improvements at the NW 57th Avenue Interchange

This project was completed in 18 months and opened to the public in 2006. It extended and widened the existing fourth outside lane westbound from just east of NW 57th Avenue/Red Road to just west of NW 57th Avenue connecting to the ongoing improvements from this point to the SR 826/Palmetto Expressway. It also provided a new exit ramp to NW 57th Avenue southbound. This eliminated the condition where the outside fourth lane dropped at NW 57th Avenue in the westbound direction creating conflicts in traffic movements and unsafe conditions.