As storms become more frequent and severe, roadways are subjected to increased precipitation that can lead to washouts and shoulder erosion.
To identify a gravel mix that’s more likely to stay in place along a road’s shoulders, the Nebraska Department of Transportation initiated a study that developed a new testing device and evaluated a variety of aggregates and binding agents.
Researchers also developed a method for monitoring conditions and a simulation model for predicting the maintenance that shoulders will need over time.
Read the report: Erosion Resistant Rock Shoulder, October 2023.
Image source: Nebraska Department of Transportation