Slope Instability

Collapsed roadway with guardrail damaged by a landslide exposing soil beneath.

Slope Instability

Slope instability occurs when soil or mixed soil–rock slopes can no longer resist movement from gravity, water pressure, erosion, or external loading. These issues often develop gradually, with early warning signs like cracking, settlement, bulging, or shoulder drop-off, before accelerating into more disruptive slope failure.

Along transportation corridors and developed sites, slope instability can restrict access, reduce roadway width, and create ongoing maintenance demands, especially in steep or space-constrained environments. When left unaddressed, instability typically worsens over time as wet seasons, poor drainage, and progressive loss of support increase the likelihood of larger failures.

Explore the slope instability conditions below to better understand common drivers, warning signs, and engineered stabilization approaches, including steep slope stability concerns and embankment or shoulder failures that threaten long-term corridor reliability.

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If you’re seeing cracking, settlement, shoulder drop-off, or slope movement near a roadway or developed area, GeoStabilization International can help. Reach out and a stabilization specialist will follow up to discuss site conditions, access constraints, and the right approach to restore support and reduce risk.

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