Harry R. Feldman, Inc. was contracted by J.F. White Contracting Company to scan 5500 linear feet of Interstate 93 as part of a pre final paving operation on the Medford Fast 14 Bridge Deck Replacement Project for the Massachusetts D.O.T.
Scanning was performed at night and during the day to complete existing surface documentation under the accelerated project. The company turned around 0.05’ interval contours and digital terrain models (DTM) of each area scanned within 2 days of the field work completion.
The scanning work utilized existing lane closures to scan the width of the highway and 200-300’ of the approaches. The work avoided the need to physically occupy points for measuring the grades. This saved additional lane shutdowns, possible detours and time delays in getting the survey completed for the intense project.
The DTM surface was created with about 20,000 points (from each individual section) to build the surface and calculate the detailed contours.
This survey is just one example where scanning can save owners money by doing a large detailed project with a laser scanner instead the traditional total station and data collector method.