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New to TDM?

What is TDM?*

Transportation demand management, or TDM, refers to strategies that improve the efficiency of transportation resources and reduce travel demand. The goal of TDM is to reduce the number of single-occupancy private vehicles on roads, as well as the number of vehicle miles traveled (VMT). "Vehicle Miles Traveled (VMT) is the total number of miles driven by all vehicles within a given time period and geographic area. It is used by regional transportation and environmental agencies for planning purposes. VMT is influenced by factors such as population, age distribution, and the number of vehicles per household. However, the greatest factor by far is how land uses are arranged" (StreetsBlog).

Why Manage Transportation Demand?

Managing transportation demand can help address the problems of traffic congestion, air pollution, and related health and safety risks (collisions, asthma for example). Also a concern is the amount of land needed to accommodate vehicle traffic and parking. Using TDM approaches can lead to better environmental outcomes, improved public health, stronger communities, and more prosperous and livable communities.

How is TDM implemented?

There are many TDM approaches to influence people’s travel behaviors. Some improve the transportation options available; some provide incentives to change travel modes; some focus on land use; and some methods focus on policies and programs that encourage changes in travel choices.

* To learn more about transportation demand management, visit our resources page and the Victoria Transport Institute's online TDM encyclopedia.