Capacity Expansion Widening of the Sawgrass Expressway (SR 869) from South of Sunrise Boulevard to South of US-441/SR 7
Florida Department of Transportation – Florida Turnpike Enterprise
The Florida Department of Transportation conducted an 18.5 mile PD&E Study to evaluate widening and capacity improvement alternatives of the Sawgrass Mainline in South Florida incorporating Express Lanes from South of Sunrise Blvd. to South of US 441/SR 7 interchange. The 3D Precision Mapping data base provided the necessary tools for the capacity expansion design for the mainline, 8 interchange configurations, side roads and the mainline toll plaza. A Feasibility Study was also performed at the System-to-System Interchange of I-595/I-75/SR 869 for potential express lane connections.
This capacity expansion project was on a fast track to support FDOT’s Statewide Acceleration and Transformation approach (SWAT) to reduce the time to construct by +50%. ACA used a hybrid 3D mapping approach that would provide broad coverage and at the same time highly accurate detail of the road corridor.
ACA’s hybrid approach used Mobile LiDAR for all road surfaces and Helicopter Photogrammetry for all off-pavement and beyond-right of way mapping. This accelerated approach enabled engineers to start the design process within two months.
The design survey limits were 19.2 miles in length along the Sawgrass mainline and ramps and approximately 8.2 miles along the side streets within the area of interest. ACA worked closely with Stantec and Wantman Group, Inc. to collect all survey data and was responsible for merging the field survey data from obscured areas for the design survey database. ACA provided raster imagery; a calibrated LiDAR point cloud tiled in LAS format; DTM and planimetric topographic survey files in 3-D MicroStation (SS3 compliant) format; pavement cross slope, bridge clearance and guard rail clearance data, and field survey /trajectory accuracy reports. All work was performed in accordance with the latest FDOT Terrestrial Mobile LiDAR Guidelines and met Florida Minimum Technical Standards.