Roadsides planted with greenery can help control and filter stormwater, soil leftover from road construction often lacks permeability and inhibits plant growth.
To improve soil conditions along the state’s roads and identify a use for locally available industrial by-products, the Minnesota Department of Transportation evaluated nine granular and organic additives.
The project produced a design guide and recommendations for maximizing biofiltration and plant growth.
Read the two-page research summary: Reusing Local By-Products to Create Sustainable Roadside Soil, October 2024.
Image source: Minnesota Department of Transportation