This webinar will explore the findings of Transportation Research Board Special Report 298: Driving and the Built Environment:  Effects of Compact Development on Motorized Travel, Energy Use, and CO2 Emissions.  This congressionally mandated study examines the relationship between land development patterns and vehicle miles traveled (VMT) in the United States to assess whether petroleum use, and by extension greenhouse gas (GHG) emissions, could be reduced by changes in the design of development patterns.   The study estimates the contributions that changes in residential and mixed-use development patterns and transit investments could make in reducing VMT by 2030 and 2050, and the impact this could have in meeting future transportation-related GHG reduction goals.

Commissioned papers used by the committee to help develop Special Report 298 are available online.  A four page summary of and a press release on the report is also available online.

Image Courtesy: TRB - Click the image to access the report

The committee chair, José A. Gómez-Ibáñez, Derek C. Bok Professor of Urban Planning and Public Policy of Harvard University, will present the study findings.   The report estimates the contributions that changes in residential and mixed-use development patterns and transit investments could make in reducing VMT by 2030 and 2050, and the impact this could have in meeting future transportation-related GHG reduction goals.

Questions from the audience will be addressed by Dr. Gómez-Ibáñez and two committee members who also contributed to the report:

• Dr. Marlon Boarnet, University of California, Irvine
• Mr. Andrew Cotugno, Portland METRO

Questions may be posed any time during the webinar, and will be answered at the end of the session.
Registration:  There is no fee to join this webinar. Space is limited, so we encourage participants to register 24 hours prior to the start of the webinar.

For questions about using this software, including webinar audio or visual complications, please contact Reggie Gillum at rgillum@nas.edu or 202-334-2382.

(Source: Bureau of Transportation Statistics, USDOT)

The Bureau of Transportation Statistics of the Research and Innovative Technology Administration has released “A Time Series Analysis of Transportation Energy Use Per Dollar of Gross Domestic Product” (GDP), a report about the decline in transportation energy use relative to GDP.  The statistical analysis shows that transportation energy consumption has been declining relative to GDP since 2000 with a steeper decline beginning in the third quarter of 2007, when the cost of fuel rose dramatically.

Transportation energy use relative to gross domestic product (GDP) has been declining within the past decade. However, the total transportation energy consumed (see figure 1) shows only a more recent decline. To see clearly the long-term decline, the seasonal component first must be separated from the underlying trendline to observe the long-term trend of that energy consumption. Then the ratio of the deseaonalized data and GDP can be taken.

The report is the first in the BTS series titled Transportation Trends in Focus.  The report can be found at http://www.bts.gov/publications/bts_transportation_trends_in_focus/2009_06_01/.