TRIMMS is a visual basic (VB) 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. Subsidies are provided to the employee by the employer to reduce the costs associated with the use of a particular method of commuting. Subsidies can take different forms such as cash, discount passes, and vouchers.
How can I use Trimms?
TRIMMS also evaluates the impact of strategies affecting access and travel times and a host of employer-based program support strategies, such as:
- TDM program support initiatives
- Alternative work schedules
- Flexible work hours
- Worksite amenities
- Rideshare matching services
- Guaranteed ride home or emergency ride home for vanpool and carpool users
- Vanpool formation support
- Employee transportation coordinators
- Compressed work week
- Flexible working hours
- Provision of childcare facilities
- Presence of sidewalks connecting transit stops within or nearby the worksite
Basic introduction to TRIMMS
Advanced use and examples
View a representative sample of how TRIMMS is being used or cited at federal, state and local levels.
TRIMMS™ (Trip Reduction Impacts of Mobility Management Strategies) was developed by the National Center for Transit Research and the Center for Urban Transportation Research at the University of South Florida under a grant from the Florida Department of Transportation and the U.S. Department of Transportation.