Financial Benefits of Proposed Access Management Treatments

Transportation access management is defined as systematic control of the design, spacing, operation, and locations of street connections, interchanges, driveways, and median openings on the roadway with the purpose of providing vehicle access while preserving the efficiency and safety of the entire transportation system. Access management is a proven method for maintaining and improving roadway capacity; traffic flow; and the safety of traffic, pedestrians, and bicyclists on rural and urban highways and streets (1). Improvements to operational efficiency and safety reduces transportation costs. Reductions in delay and improvements to traffic flow also reduces vehicle emissions, reducing the environmental impacts of transportation. Research has shown that access management related improvements to traffic operations and safety have a positive impact on the local economy (2). Access management methods include, but are not limited to, increasing the spacing between signals and intersections, managing access to/egress from driveways, median treatments 2 (including the use of medians, indirect left-turns, etc.), use of frontage roads, providing turn lanes for heavy traffic movements, and land use policies. Each of these methods has safety and operational impacts (leading to financial and other benefits) as well as associated financial costs for implementing the changes and compensation to landowners for lost property or access. The decision of whether to implement a change often depends on the overall cost as well as the comparison of the cost relative to the expected benefits of the change. These benefits include the current and future benefits to both the public and the agency making the changes. Also, the project must fit within the overall budget of the agency making the changes. Currently, no locally calibrated tool for South Dakota exists that captures the complexity of the current and future public benefits of proposed access management for estimating the financial and other benefits and comparing them with the associated financial costs. The benefits may be related to many local conditions including land use and zoning, roadway type and functional classification, traffic volumes, pedestrian and bicyclist volumes and characteristics, and the locations and other characteristics of access points. Given that many outcomes (i.e., safety and traffic operations) are related to human factors that are often unaccounted for in research, estimates of safety effects and operational changes associated with general access management methods provided in the Highway Safety Manual (3) and the Access Management Manual (4) may not be applicable in South Dakota. Also, more specific, complete estimates of the effects of access management methods on public benefits that are locally calibrated are desired when making decisions related to the value of the investment.


  • English


  • Status: Active
  • Contract Numbers:


  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    South Dakota State University, Brookings

    Box 2201, AD 130
    Brookings, SD  United States  57007
  • Principal Investigators:

    Wood, Jonathan

    Guler, Ilgin

    Gayah, Vikash

  • Start Date: 20161213
  • Expected Completion Date: 20180731
  • Actual Completion Date: 0
  • Source Data: MPC-520

Subject/Index Terms

Filing Info

  • Accession Number: 01648048
  • Record Type: Research project
  • Source Agency: Mountain-Plains Consortium
  • Contract Numbers: DTRT13-G-UTC38
  • Files: UTC, RiP
  • Created Date: Oct 4 2017 11:26AM