New Project: Using Satellite Technology to Monitor Ground Deformations Adjacent to Roads

May 12, 2026 - 21:17

Geohazards caused by ground movements such as landslides, subsidence, and sinkholes are causing major damage and disruptions to Minnesota's highway network. Currently, the state relies on reactive monitoring methods, which only detect problems after they have already occurred. To change this, a new project will use satellite technology to monitor ground deformations along roads before they become serious threats.

The initiative will employ a technique called Interferometric Synthetic Aperture Radar, or InSAR. This method uses satellite radar images to measure very small changes in the Earth's surface over time. By comparing images taken weeks or months apart, researchers can spot areas where the ground is slowly sinking, shifting, or bulging. This allows engineers to identify potential hazards early and plan repairs or reinforcements before a road buckles or a slope fails.

The project focuses on several high-risk corridors in Minnesota, particularly in regions with unstable soils or steep terrain. Data from the satellites will be combined with ground-based sensors and historical records to create a comprehensive picture of ground movement. The goal is to move from fixing damage after it happens to preventing it in the first place. Officials believe this proactive approach could save millions in repair costs and reduce the risk of accidents. The work is expected to run for two years, with results helping to guide future maintenance and construction decisions across the state.