• mobilitylab.org site logo
  • Mobility Lab main menu search icon:  click to do a search
    • Understanding Transportation Demand Management
    • Transportation Demand Management In Action
      • Arlington Transportation Partners
        • The Practice of Transportation Demand Management
      • Information and Outreach
        • Commuter Services
        • Messaging
        • Champions Program
      • Learn more about TDM
        • Further Reading
    • Our Research
      • Travel Behaviors
        • Transit
        • Bike
        • Walk
        • Ridesharing
        • Micromobility
      • Arlington Analysis
        • Regional Surveys
        • Evaluations
        • Building Studies
      • Market Profiles
        • All Profiles
    • Transit Oriented Communities
    • Urban Planning
    • Resources
      • The Transportation Cost-Savings Calculators
        • ROI Calculator
        • TRIMMS 4.0
      • Research Data
        • Transit APIs
        • Archived Articles
      • Video Library
      • Infographics
      • Glossary Of Key Terms
    • About Us
      • Meet Our Team
      • Careers

The Practice of Transportation Demand Management

  • Home
  • Transportation demand management
  • Further reading

What is TDM? Shaping a new era of transportation options

April 20, 2016

Here at Mobility Lab, we throw around the term “transportation demand management,” or “TDM” for short, as the core concept that unites our research and coverage. But the idea itself is one that is often not present in the widespread public understanding of and discussions about transportation and transit issues.

Hence the purpose of our new video:

[vc_video link=”https://youtu.be/4w-ZUBeGdns”]

Put broadly, TDM is the outreach, design and education that informs all the mode choices commuters make on a daily basis. Some of these — office carpool matching programs, for example — are more explicit, while other pieces are harder to spot, like the allocation and pricing of parking.

It’s easy for many to see a congested highway and think, “we need to build the subway out to here,” but more difficult to imagine the behavior changes that make daily crowds and traffic functional and sustainable. Nevertheless, TDM works closely within existing infrastructure to ensure that everyone can easily access more efficient modes of traveling. And in the case of transit-system closures or massive events, TDM can be an essential tool in minimizing the potential disruption to an entire region.

In our latest video, we spoke with several leaders in the transportation industry, and staff at Mobility Lab, about what TDM really is, how it works, and why it’s a key part of the transportation discussion.

For more background on how TDM works, visit our “What is TDM?” page.

 
share this item

Subscribe to Receive Updates on the Latest Mobility Research and Trends

Arlington Virginia Department of Environmental Services

Transportation Resources for Arlington County (TRAC) is funded in part by grants from the U.S. Department of Transportation (DOT), the Virginia Department of Transportation (VDOT) and the Virginia Department of Rail and Public Transportation (DRPT)

TRAC Family of Sites
  • Arlington Transit
  • Arlington Transportation Partners
  • Bike Arlington
  • Capital Bikeshare
  • Car-Free Near Me
  • CommuterDirect
  • CommuterPage
  • Dieta Cero-Auto
  • The Commuter Store
  • Walk Arlington
  • Terms and Conditions
Follow Us
  • facebook
  • twitter
  • linkedin
  • youtube
  • instagram

© 2026 Mobility Lab, a program of Arlington County, Virginia

Accessibility Adjustments

Powered by OneTap

Accessibility Commitment for Mobility Lab

At Mobility Lab, we are committed to making our digital presence as accessible and inclusive as reasonably possible for all users, including individuals with disabilities. Our goal is to improve the usability of https://mobilitylab.org and to support a more accessible experience for everyone, regardless of their abilities or the technologies they use.

Our Approach to Accessibility

We aim to align with the Web Content Accessibility Guidelines (WCAG), which define internationally recognized standards for digital accessibility. While full compliance cannot always be guaranteed, we strive to implement improvements where feasible and regularly review accessibility-related aspects of our website. Accessibility is an ongoing process, and we are committed to improving the experience over time as technologies, standards, and user needs evolve.

Accessibility Features

To support accessibility, https://mobilitylab.org may utilize tools/plugins as the accessibility toolbar. This interface provides users with a range of helpful features, including:
  • Adjustable text size and contrast settings
  • Highlighting of links and text for better visibility
  • Full keyboard navigation of the toolbar interface
  • Quick launch via keyboard shortcut: Alt + . (Windows) or ⌘ + . (Mac)
Please note the following:
  • The availability and effectiveness of these features depend on the website's configuration and ongoing maintenance.
  • While we strive to ensure accessibility, we cannot guarantee that every part of https://mobilitylab.org will be fully accessible at all times. Some content may be provided by third parties or affected by technical constraints beyond our immediate control.

Feedback and Contact

We welcome your feedback. If you experience any accessibility barriers or have suggestions for improvement, please contact us: Email: info@mobilitylab.org We are committed to reviewing all inquiries and aim to respond within 3–5 business days. If you require assistance accessing any part of this website, we are happy to provide support through alternative channels upon request. Last updated: February 19, 2026
How long do you want to hide the toolbar?
Hide Toolbar Duration
Select your accessibility profile
Vision Impaired Mode
Enhances website's visuals
Seizure Safe Profile
Clear flashes & reduces color
ADHD Friendly Mode
Focused browsing, distraction-free
Blindness Mode
Reduces distractions, improves focus
Epilepsy Safe Mode
Dims colors and stops blinking
Content Modules
Font Size

Default

Line Height

Default

Color Modules
Orientation Modules