Exploring Alternative Methods for Vegetation Control and Maintenance Along Roadsides

摘要

The search for alternative methods for controlling and maintaining vegetation along roadsides has just begun. This work was initiated to find alternatives to the traditional methods for roadside vegetation maintenance that includes the use of registered synthetic herbicides and regular mowing. The list of alternatives to the standard roadside maintenance techniques is endless. In this two and a half year study, the materials and methods considered included bioherbicides, ultra violet light, barriers/mats, cultivation, mechanical/chemical combined, grazing, steam, natural-based products and flaming. Additionally, altered mow timings of yellow starthistle were included in the range of studies, even though mowing is a standard practice. The most efficient alternatives were those that could be applied easily and accurately, using current roadside vegetation maintenance equipment. Alternatives such as animals for grazing, UV light to burn foliage and mechanical/chemical combined required liability insurance or large capital investments. The use of steam and barriers/mats were omitted because of testing that had been or was being done by another division or district within the California Department of Transportation (Caltrans).