Permanent Vegetation Control Treatments for Roadsides

Control of vegetation along roadsides is required for fire prevention, adequate sight distance, facility inspection needs, reduction of invasive and nuisance weeds, roadside aesthetics, and protection of roadside appurtenances. Roadside vegetation can be controlled using herbicides, mowers, and other equipment or by long-term vegetation controls. Long-term vegetation controls decrease the need for recurring chemical and mechanical vegetation control, thus reducing recurring maintenance costs, highway worker exposure to traffic, impacts to the environment and cultural resources, and maintenance-related delays to the traveling public. Additional advantages include maintaining the integrity of highway surfaces by controlling erosion and damage to the pavement structure from encroaching roots and water intrusion. However, these vegetation controls vary in their effectiveness, longevity, initial construction costs, maintenance requirements, and aesthetic values. Some treatments may also affect the safety performance of highway appurtenances, such as guardrails, cable barriers, and signs. For example, continuous asphalt or concrete may potentially result in pocketing or rupture of strong-post guardrails. The objective of this research is to produce up-to-date guidance for transportation agencies for selecting appropriate vegetation controls that will be effective in preventing or significantly retarding the growth of unwanted vegetation around roadside appurtenances and along roadsides. The guidance will identify controls appropriate for new construction and for existing facilities. In addition, the guidance will describe how to select effective long-term vegetation controls that also address traveler and highway worker safety and costs of construction and maintenance, as well as minimize adverse environmental impacts.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4368

Language

• English

Project

• Status: Completed
• Funding: $200000
• Contract Numbers:

  Project 14-41

• Sponsor Organizations:

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Hartell, Ann

• Performing Organizations:

  Texas A&M Transportation Institute, College Station

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135
• Principal Investigators:

  McFalls, Jett

  Storey, Beverly

• Start Date: 20180523
• Expected Completion Date: 20200831
• Actual Completion Date: 0
• Source Data: RiP Project 41634

Subject/Index Terms

• TRT Terms: Aesthetics; Erosion control; Guardrails; Guidelines; Roadside; Roadside flora; Vegetation control
• Subject Areas: Environment; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01634939
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 14-41
• Files: TRB, RIP
• Created Date: May 18 2017 12:15PM