• LinkedIn
  • Twitter
  • Instagram
  • Facebook

Route 79 Viaduct

The Route 79/I-195 interchange is located near Battleship Cove in downtown Fall River, MA. This interchange delivers traffic from I-195 down to the Battleship Cove and downtown Fall River via a viaduct along Route 79 and a series of on and off ramps. The Route 79 Viaduct is more than 2,000 feet long and has several spans, while the ramp system consists of several spans and is approximately 8,000 linear feet long. The Massachusetts Department of Transportation (MassDOT) studied alternatives including include rehabilitating the existing viaduct and ramps, replacing the viaduct and ramps with a new structure, and reconfiguring the interchange to remove the viaduct to improve this interchange.

Bullet Complex infrastructure
Bullet Combination of spatial data acquisitions

To assist with the analysis of the various alternatives, highly detailed spatial data was requested. WSP USA utilized a unique approach that consists of a combination of aerial photogrammetry, 3D Laser Scanning and conventional survey techniques to meet the challenge.

A combination of aerial mapping and conventional survey techniques were employed to capture data at the ground surface and sub-surface level. This imagery is used to prepare a base map at ground level. Field crews conducted conventional surveys on-the-ground to supplement the aerial mapping data in areas that are obstructed by tree canopy and existing infrastructure. The property boundary, right-of-way, and sub-surface utility data are also captured using conventional survey techniques. All survey and aerial mapping detail are integrated into a single CAD database. 

To obtain existing conditions information on the various levels of infrastructure above the ground level, 3D Laser Scanning techniques were employed. The data captured is suitable to extract 3D polylines and CAD models of the piers, abutments, road surface, bents, structural steel, decking, guard rails, drainage, and lighting on the viaduct and ramp systems