Development of Performance Matrices for Evaluating Innovative Intersections and Interchanges

Innovative (alternative, unconventional) intersections and interchanges are generally defined as design concepts that are able to reduce the number of signal phases and conflicts at the main intersection/interchange, thereby increasing the efficiency, capacity and safety of the signalized intersection. In most cases, this is accomplished by rerouting left turns at a point well ahead of the main intersection/interchange, or accomplishing left turns through a combination of through, right and U-turn movements. These designs are regarded to be "unconventional" because they incorporate geometric features or movement restrictions that would be permissible at standard intersections/interchanges. Such elements include the elimination and/or relocation of various through and turning maneuvers, the use of indirect turning movements, and the inclusion of roundabout designs. Innovative intersections and interchanges, primarily Continuous Flow Intersection (CFI) and Diverging Diamond Interchange (DDI), have seen an increase in numbers in the United States over the past several years, especially in Utah, making Utah a leader in the country in implementation of these designs. Although on the surface these designs seem to improve traffic performance, their complete impacts and benefits are hard to assess. There are still no clearly defined guidelines and methodologies for monitoring and measuring performance of these designs from state departments of transportation (DOTs) manuals, American Association of State Highway and Transportation Officials (AASHTO), Highway Capacity Manual (HCM), National Emergency Management Association (NEMA) and Highway Safety Manual (HSM). Innovative designs have impacts on safety, accessibility, transit, pedestrian and non-motorized traffic, land use, economic development, and environment, making them an excellent candidate for an in-depth analysis of different benefit-impact combinations. There is not a defined straightforward way for this analysis. Researchers and practitioners have recognized that there are gaps when it comes to innovative solutions, so it can be expected that research in this area will increase in the next several years. The primary objective of this research project is to develop a set of performance matrices for evaluation of innovative intersection designs, from operational, safety, accessibility, transit, pedestrian, non motorized traffic, land use, economic development, and environmental standpoints. The methodology will be based on a set of algorithms implemented in an underlying computational engine (i.e. Excel-based program), which will generate performance matrices based on the given geometric, traffic, transit and land use data.


  • English


  • Status: Active
  • Contract Numbers:


  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue
    Washington, DC  United States  20590
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    University of Utah, Salt Lake City

    College of Engineering, Department of Civil Engineering
    Salt Lake City, UT  United States  84112-0561
  • Principal Investigators:

    Zlatkovic, Milan

  • Start Date: 20140401
  • Expected Completion Date: 20180731
  • Actual Completion Date: 0
  • Source Data: MPC-465

Subject/Index Terms

Filing Info

  • Accession Number: 01532638
  • Record Type: Research project
  • Source Agency: Mountain-Plains Consortium
  • Contract Numbers: DTRT13-G-UTC38
  • Files: UTC, RiP
  • Created Date: Aug 1 2014 1:14AM