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Demand Management

A Primer for Transportation Planners and Engineers



Demand Management infographic thumb
In partnership with SSTI


New tool INVEST-igates demand, sustainability


The results are in from a study assessing sustainability in corridor planning and project development, using an innovative online tool. WSDOT collaborated with the Federal Highway Administration to evaluate a new assessment tool called INVEST – Infrastructure Voluntary Evaluation Sustainability Tool. It provided insight to better integrate demand management and public health strategies into planning and project development.

FHWA developed the tool to help transportation agencies evaluate and improve the sustainability of their planning, project development, and operations and maintenance programs and processes.

WSDOT used INVEST to assess the unfunded portion of the SR 520 Bridge Replacement and HOV Program and three central Puget Sound corridor studies for US Highway 2, State Route 520 and State Route 516. WSDOT will use the results to improve its sustainability practices and provide constructive feedback to FHWA.

Download the INVEST report (pdf 1.6 mb)




More Information


For more information about demand management, please contact:


Demand management is an effective strategy for improving transportation efficiency from the project level to the statewide system. It's a community-based approach that relies on collaboration, commuter information and incentives to influence travel patterns and commuter choices.

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It's also an effective strategy for planners and engineers to make transportation projects more sustainable and economical.

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Moving Washington logoMoving Washington

WSDOT's Moving Washington approach to a safe, well maintained transportation system integrates three primary strategies:

  • Operate Efficiently
  • Add Capacity Strategically
  • Manage Demand

Effectively used, the tools and techniques of demand  management, such as commute trip reduction, telework, vanpool programs and ridematching, ease the burden on existing systems and allow busy corridors to perform as well as they were designed to perform.

By engaging project-area stakeholders, employers and jurisdictions in a collaborative effort to find transportation solutions, projects earn the support of communities. Managing demand also reduces the need to add more lane space, freeing up scarce construction dollars for other transportation improvements.

Learn more on the Demand Management Q & A page.

Tools to Manage Demand

Project assistance

About half of commuters
in Seattle’s I-5/SR-99
corridor bike, walk,
carpool, vanpool or use transit. If they didn't, it would mean gridlock for everyone.
Soon WSDOT's Public Transportation Division will begin a research project to determine the best ways to assist transportation project engineers and planners in putting demand management to work. Bus icon
This could include identifying demand management programs already underway in a project area, engaging local stakeholders to identify new opportunities and forming collaborations to put new programs in place.

Stay tuned, more information will be available here in coming weeks.