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TDM Research Reports

The following research reports should help researchers and practitioners alike:

     
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Reducing Vehicle Trips and Vehicle Miles of Travel Through Customized Travel Options
This Florida Department of Transportation Research Center- funded project conducted by the Center for Urban Transportation Research (CUTR) at the University of South Florida was designed to implement a new application to help reduce total vehicle trips and vehicle miles of travel by encouraging the use of trip-chaining and substitution for all types of trips. CUTR provided employees of a local YMCA with travel diaries and implemented a three-stage research design: 

  • Collect baseline travel data 
  • Provide experimental group with customized travel suggestions, while not providing this information to control group 
  • Collect travel data after providing the suggestions 

A total of 75 individuals in 39 households participated in the research. An analysis of covariance was conducted on the average contributed vehicle miles of travel and contributed vehicle trips, using the second week’s results as the dependent variable. The provision of suggestions had a statistically significant effect on vehicle miles and trips contributed. Overall, this experiment showed that the provision of travel information will r educe vehicle miles of travel. Further research should be conducted to indicate the extent to which such information needs to be customized.

pdf HTML A Market-Based Approach to Cost-Effective Trip Reduction Program Design 
The purpose of this Florida Department of Transportation Research Center- funded project conducted by the Center for Urban Transportation Research (CUTR) at the University of South Florida project was to quantitatively estimate the impacts of various mixes of TDM strategies on ridesharing tendencies. A major component of this project was to develop estimates of impacts under different conditions using identical methodologies and to test whether projected impacts were the same across all situations tested. This project was designed to accomplish the following three objectives: 
  • To determine if the impacts of selected TDM strategies are similar in different areas within Florida itself; 
  • If so, to determine if these impacts are also similar to impacts measured in other areas of the nation from other SP discrete choice studies 
  • To provide a mechanism for the development of effective TDM strategies for the areas surveyed, which included Miami/Fort Lauderdale, Jacksonville, and Tampa-St. Petersburg.
pdf   TDM Case Studies and Commuter Testimonials  
This document includes case studies about transportation demand management (TDM) success stories and testimonials from individuals from various regions of the country that attest to the benefits that can accrue from of a wide range of travel choices besides solo-driving. Case studies of successful transportation demand management efforts are illustrated from around the country. These include area-wide programs and single site programs such as ridesharing, telecommuting, access to transit, guaranteed ride home programs and roadway enhancements as well as combinations of these and other transportation related strategies. Personal commuter testimonials cover topics such as: pedestrian and bicycle programs; compressed work weeks; guaranteed rides home; HOV lanes; ridesharing; telecommuting and transit. This publication was funded through a cooperative agreement between EPA and the Transportation Demand Management Institute of the Association for Commuter Transportation. It is hoped that practitioners in the field will find this information of use when looking to cite success stories and benefits to individuals of TDM strategies.
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Urban Mobility Study
Study shows traffic worsening in a variety of ways and places Getting a handle on just how bad traffic congestion is becoming in U.S. cities depends a lot on where – and how – you look at it, according to an annual study: 

  • The annual cost of traffic congestion per driver in about one-third of the cities studied exceeds the statewide average cost of auto insurance for those cities. 
  • Drivers in one-third of the cities spend at least half as much time stuck in traffic as they do on vacation each year. 
  • In more than half of the cities studied, the amount of time drivers spend stuck in traffic has grown by at least 350 percent over the past 16 years. 

These and other trends are illustrated in the 1999 Annual Mobility Report, published by the Texas Transportation Institute at Texas A&M University. provides data on the performance of some elements of that transport in 68 urban areas through research performed in cooperation with the following organizations: California Department of Transportation, Colorado Department of Transportation, Kentucky Transportation Cabinet, Maryland State Highway Administration, Minnesota Department of Transportation, New York State Department of Transportation, Oregon Department of Transportation, Washington Department of Transportation, Texas Department of Transportation and the U.S. Department of Transportation, Federal Highway Administration.

 

     



 

Transportation Research Board's Committee on TDM
Provides summaries and abstracts of various TDM-related papers and presentations submitted to the Transportation Research Board since 1997.

 

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