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Roadsides provide promising monarch habitat as they frequently contain nectar and host plants; however, they also present a range of risks, including pesticide spillover, vehicle collisions, contaminant runoff, and non-native vegetation.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 942: Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies provides guidance for roadside managers to determine the potential of their roadway corridors as habitat for monarch butterflies.

The report also includes several tools and decision-support mechanisms to optimize habitat potential in a manner that is compatible with the continued operation and maintenance of the roadside.

Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2020. Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies. Washington, DC: The National Academies Press. https://doi.org/10.17226/25693.

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Publication Info

208 pages | 8.5 x 11 |  DOI: https://doi.org/10.17226/25693
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