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Trip Reduction Impacts of Mobility Management Strategies (TRIMMS)

Trip Reduction Impacts of Mobility Management Strategies (TRIMMS) is a visual basic application spreadsheet model that estimates the impacts of a broad range of transportation demand initiatives and provides program cost effectiveness assessment, such as net program benefit and benefit-to-cost ratio analysis.

TRIMMS evaluates strategies directly affecting the cost of travel, like public transportation subsidies, parking pricing, pay-as-you-go pricing, and other financial incentives. TRIMMS also evaluates the impact of strategies affecting access and travel times and a host of employer-based program support strategies, such as: alternative work schedules, telework and flexible work hours, and worksite amenities.

Key questions addressed:

  • What is the impact of transportation demand initiatives?

Sample data inputs:

  • Program costs
  • Duration
  • Total employees or commuters affected

Sample quantitative outputs:

  • Changes in mode share, trips, and vehicle miles of travel
  • Changes in all relevant cost externalities (i.e., air pollution, congestion, fuel consumption, climate change, health and safety, noise pollution)

Access Trip Reduction Impacts of Mobility Management Strategies (TRIMMS).


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Case studies

Tool Summary

  • Free
Expertise Required:
  • Simple
Geographic Scope:
  • Local
  • Policy
  • Project
Impacts Assessed:
  • Economic
    • General
  • Environmental
    • Air
    • Greenhouse Gases
  • Social
    • Public Health