Permanent Vegetation Control Treatments for Roadsides

The objective of this research is to produce up-to-date guidance for transportation agencies for selecting appropriate permanent 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 permanent vegetation controls that also address traveler and highway worker safety and costs of construction and maintenance, as well as minimize adverse environmental impacts. Anticipated research products are a report and a recorded webinar, video, or similar product suitable for disseminating the research results. The report should, at a minimum, include: (1) A literature review that summarizes and synthesizes information about permanent vegetation controls from peer-reviewed research, gray literature (such as the results of state department of transportation (DOT) research and pilot projects), state vegetation control guidelines, and information collected through targeted contacts with technical experts and practitioners. (2) A compilation of permanent vegetation controls. For each treatment, the following should be provided: information on initial cost and constructability; ongoing maintenance requirements; longevity; appropriate site conditions (e.g., soils, traffic volumes, aesthetic factors); appropriate ecological and climate conditions (e.g., frostlines, precipitation, winter maintenance requirements); type of vegetation effectively suppressed; and suitability for use in conjunction with the installation, repair, and replacement of common types of roadside appurtenances. (3) Recommended permanent vegetation controls for a range of roadside conditions. For each recommendation, identify supporting evidence from the literature. (4) Graphical presentation of recommended permanent vegetation controls to allow ready comparisons and to facilitate coordination of vegetation management with roadside design. The graphical presentation should also be publishable as a stand-alone document. (An example of a potential layout is the table of cable barriers provided by the Federal Highway Administration Office of Safety and available at: (5) A brief summary of recommendations for additional needed updates to the Guidelines.  


  • English


  • Status: Proposed
  • 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

  • Start Date: 20171101
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 41634

Subject/Index Terms

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 1:00AM