Native Vegetation Establishment for IDOT Erosion Control Best Management Practices

Abstract

The objective of this project was to develop native roadside vegetation best management practices for the Illinois Department of Transportation. A review of current practices was undertaken, along with a review of those of other state departments of transportation that routinely use native vegetation for roadsides. Additionally, literature was reviewed for site preparation and desirable qualities, seed and species selection and quality control, application of seed, and management of vegetation. To better understand current practices, we performed a study to assess the performance of existing native seed mixes and practices along Illinois roadsides. Multiple sites were identified where native seed mixes were applied to roadsides. Vegetation sampling was performed to identify which species were present and in what quantities, and was compared to the seed mixes that were applied, to determine which species were successful. Based on the literature review and study results, numerous recommendations for native roadside vegetation best management practices were made.