I-95 Section AFC Improvements, Philadelphia, PA

As part of the widening of Interstate 95 reconstruction in Philadelphia, Nave Newell laser scanned the eight existing lanes along the north and southbound sides of the highway during the overnight hours.  A combination of laser scanning technology and conventional survey methods best suited the DOT’s needs for this project.  Two days of control survey collected 70 control points via conventional methods. 10 nights of laser scanning bridge decks along one mile of the interstate were needed to collect the necessary data and measurements. The key advantage to laser scanning was the significant reduction in the “Maintenance and Protection of Traffic” requirements as the scanning was done from the shoulder areas. Once the scanning was complete, 80 hours of data processing produced the eight bridge deck surfaces and two retaining wall models. Additional deliverables included a scan database, InRoads Digital Terrain Models and Control Survey Reports.

Laser scanning the interstate provided the bridge engineering consultant, Gannett Fleming, with an extremely high level of detail to perform the structural design, a surface DTM with exact tie-in information and accurate field data. The use of the laser scanner on I-95 reduced project costs; improved roadway worker safety and mitigated the impact on the traveling public with minimal lane closures.

Owner: Pennsylvania Department of Transportation

Client: Gannett Fleming

Services: High-Definition Survey, Control Surveying

Carmel Interlocking, Glenside, Montgomery County, PA

Nave Newell surveyed approximately one mile of track from Wayne Junction to Glenside to create an accurate base plan for which new work could be superimposed.  A combination of laser scanning technology and conventional survey methods best suited the owner’s needs for this project.  One day of control survey was collected via conventional methods along with two weeks of laser scanning during the day and in the overnight hours during OOS (Out of Service) time.  The project required data processing to develop a 3D model of the rail facilities.  The model will be utilized by SEPTA’s Electrification & Traction department to locate new catenary wires and equipment.  Additional deliverables included a scan database and AutoCAD base DGN files for both 2D topographics and 3D modeling.

Laser scanning the rail facilities provided the client with a phenomenal level of detail, a versatile 3D model to be used during design and construction and a higher degree of confidence in the data than ever before. 

Owner: Southeastern Pennsylvania Transportation Authority

Client: Gannett Fleming