Interstate 93 Roadway & Bridge Existing Conditions - LandTech Consultants Inc.

Project teams needed a complete existing-conditions plan for over three miles of Interstate 93, including detailed MassDOT bridge documentation for a structure spanning nearly 800 feet over the Merrimack River. This stretch of highway is considered one of the heaviest traveled corridors in Massachusetts.

In addition to the highway, the bridge required accurate documentation of structural components—particularly along the underside—without disrupting traffic or compromising safety. Closing lanes to safely complete field work was simply not an option. The project required a creative, non-disruptive approach to data collection.

LandTech selected mobile laser scanning as the primary data collection method to capture highway conditions while keeping all travel lanes open. To document highway side slopes, the team deployed a LiDAR-equipped drone, ensuring complete coverage beyond the roadway.

To capture the underside of the bridge, LandTech adapted its approach by mounting the mobile scanner on a boat. This allowed the team to safely and accurately document structural elements over the river without impacting traffic above.

Surveyed over three miles of active interstate highway without lane closures
Captured detailed bridge geometry, including underside structural components
Integrated data from mobile scanning, UAV LiDAR, terrestrial laser scanning, and traditional survey control
Delivered accurate base plans to support design and construction—on time and on budget, without traffic disruption

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plan smarter and manage assets more effectively.