Entries by Marisa Larson

Renewable Energy Generation in the Highway Right-of-Way

State Departments of Transportation (SDOTs) are increasingly exploring the use of highway right-of-way (ROW) to accommodate renewable energy technologies. This paper provides information on potential business models, state rules, regulations, and policies, and example projects for energy generation in the ROW. 

Free Energy Solar Highway Program

The Free Energy Solar Highway Program research project identified best practices nationally and determined the financial feasibility of generating solar power on New Mexico DOT property at the lowest possible cost.

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MN Research Shows Solar Grazing Improves Soil Quality

Solar energy is the fastest growing renewable energy source. It is predicted that 20-29% of global power will be sourced by solar by 2100. Solar energy requires larger land footprints and long-term commitments. Vegetation left under solar panels reduces soil degradation and opens up the potential for solar grazing as a dual income for farmers and vegetation management for solar utilities. Research conducted on multiple solar sites in Minnesota reveal there can be meaningful forage in 45% shade and 80% shade from solar panels. Furthermore, grazing sheep under solar panels produces both a higher content of carbon and nitrogen in the soil. Managed episodic grazing can be used as a strategy for carbon sequestration and vegetation management. Soil properties show an overall improvement and benefits depending on soil properties. Future work must be done to measure the long term soil carbon and hydrological properties.