Synthesis of Information Related to Highway Practices. Topic 49-06. Landscape Development and Management Practices for Urban Freeway Roadsides

Designing and maintaining roadside vegetation in highly developed urban settings is increasingly challenging for state transportation agencies (DOTs). In many cases, park-like and ornamental plantings installed on urban roadsides when the freeway was originally constructed have proven unsustainable for DOTs. The inability to adequately access and maintain these areas has resulted in failure of planted vegetation, loss of investment, and public criticism of state transportations agencies. Factors contributing to the challenges of designing and maintaining urban freeway roadsides include: (1) Constant high traffic volumes create safety risks for maintenance workers, difficult site access, and extensive traffic control requirements. (2) Ongoing expensive investment in added labor, equipment, and materials, particularly where permanent irrigation and perpetual mowing is required. (3) Illegal camping by transient populations. (4) Noxious and invasive vegetation problems. The objective of this synthesis is to document practices by DOTs to address problems related to urban freeway roadsides. The synthesis will focus on design and maintenance of vegetation along high visibility urban freeways with limited pedestrian access, such as wider medians, interchanges, roundabouts, and overpasses.


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  • Status: Active
  • Funding: $45000
  • Contract Numbers:

    Project 20-05, Topic 49-06

  • 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:

    Gause, Jo

  • 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:

    Storey, Beverly

  • Start Date: 20171116
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 41610

Subject/Index Terms

Filing Info

  • Accession Number: 01634825
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-05, Topic 49-06
  • Files: TRB, RiP
  • Created Date: May 17 2017 1:00AM