Guidance on Quantifying Benefits of TIM Strategies

The objective of this research is to develop a guidance document for analyzing and quantifying the impacts of traffic incidents and the economic benefits of TIM strategies. The guidance shall be useful and applicable for TIM program mid-level managers/analysts in planning and operations for a broad spectrum of transportation and incident responding agencies with varying TIM program maturity levels and a variety of data collection capabilities. The guidance document should include: (1) Methodologies for quantifying impacts of traffic incidents and benefits of TIM strategies. Note: This includes scenarios in both data rich and poor environments. The  methodologies should address relevant cost factors. (2) Demonstrative applications of the methodologies developed. (3) Validation of commonly used and/or developed new TIM statistics for framing consistent messages. (4) Incident (type and severity) related capacity reduction estimates for different roadway types. The guidance should provide analysis methodologies addressing: (1) Traffic incidents and congestion; (2) Secondary incidents; and (3) Capacity reductions due to incidents in a simple and consistent manner that is credible. Further, the guidance should enable: (1) Accurate assessment of an agency’s TIM strategies and communication of results to decisionmakers. (2) Quantification of impacts and benefits that can be used in developing operational performance measures. (3) Consideration of quantitative factors such as: safety, mobility, reliability, emissions, business, and freight impacts. (4) Understanding the relationships between elements, such as roadway type, primary and secondary incidents, level of congestion, capacity reductions due to incidents, etc. (5) Analytical estimation of secondary incidents based on factors such as incident location, duration, severity, traffic flow, and congestion.  The Highway Capacity Manual 2010 (HCM 2010) includes capacity reduction estimates due to lane blockages on freeways. There is a need for this information to also be validated with new data considering various road and traffic conditions. Also, there is a need for determining reduction in capacity estimates for other types of roadways to improve accuracy and application of TIM related analytical procedures.


  • English


  • Status: Active
  • Funding: $499985
  • Contract Numbers:

    Project 03-108

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Jared, David

  • Performing Organizations:

    Noblis, Incorporated

  • Principal Investigators:

    Shah, Vaishali

  • Start Date: 20130710
  • Expected Completion Date: 20171031
  • Actual Completion Date: 0
  • Source Data: RiP Project 38357

Subject/Index Terms

Filing Info

  • Accession Number: 01547849
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 03-108
  • Files: TRB, RiP
  • Created Date: Dec 16 2014 1:00AM