Long-Term Vegetation Management Strategies for Roadsides and Roadside Appurtenances (2023) / Chapter Skim
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Pages 54-60
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54 CHAPTER 5. CONCLUSIONS Controlling vegetation in critical areas has historically involved the use of mechanical methods, such as mowing and trimming, and chemical treatments using herbicides.
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55 (e.g., guardrail terminal, crash cushion, or breakaway sign support) , the manufacturer should be contacted to discuss the potential for the treatment to adversely affect the performance of the manufacturer's safety hardware device.
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56 Selection Tool requires three categories of user input with dropdown menus based on sitespecific conditions: • VMS location o Cable barrier o Support posts and poles o Edge of pavement o Gore/median o Guardrail o Mow edge o Slope/embankment • Level of aesthetics o Standard o High • Construction type o New construction o Retrofit VMS Location The VMS locations (i.e., cable barrier, support posts and poles, edge of pavement, gore/median, guardrail, mow edge, and slope/embankment) were chosen for use in the Interactive Selection Tool because they stand out in the literature, survey, and DOT documents as the most common areas where VMSs are used.
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57 Figure 30. Selection Tool Input Result Example.
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58 • High installation cost is $85 yd2 or greater. • Moderate installation cost is between $50 and $85 yd2.
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59 • Standard concrete pavement • Patterned concrete pavement • Asphalt concrete pavement • Stamped asphalt pavement • Asphalt composite • Rock blanket • Rubber weed mat Pervious Surface VMSs Pervious surface VMSs include the following: • Modular paving units (may be pervious depending on application) • Weed control fiber mat • Glass cullet • Gravel mulch • Rock slope protection • Organic mulch • Recycled asphalt millings • Aggregate base Selected Vegetation Establishment VMSs Selected vegetation establishment VMSs include the following: • Irrigated ornamental vegetation • Native and non-irrigated vegetation Alternative and Innovative VMSs A search of the literature and DOT documents and websites found little in the way of innovative practices or new materials.
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60 Resilience Transportation resilience is the ability of a transportation system to function at an acceptable rate in the event of extreme weather events, major crashes, and equipment or infrastructure failures. Quick recovery of a system is critical to avoid long-term effects.
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