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July 2010
NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM
Responsible Senior Program Officer:
Gwen Chisholm-Smith
Research Results Digest 348
STATE DEPARTMENT OF TRANSPORTATION ROLE
IN THE IMPLEMENTATION OF TRANSPORTATION
DEMAND MANAGEMENT PROGRAMS
This digest presents the results of NCHRP Project 20-65 Task 24, "State
Department of Transportation Role in the Implementation of Transporta-
tion Demand Management Programs." The research was conducted by
ICF International, Fairfax, Virginia. Kathleen Rooney and Michael Grant
were the Principal Investigators.
CHAPTER 1 BACKGROUND putting more emphasis on optimizing trans-
portation system performance and imple-
Transportation demand management
menting near-term, cost-effective solutions
(TDM) strategies have long played an im-
portant role in helping commuters get to to "squeeze the most" out of our existing
work and in improving air quality in metro- transportation system. Increased road ca-
politan areas. TDM focuses on strategies to pacity may ease congestion temporarily,
reduce congestion by shifting transporta- but this strategy is not a sustainable solu-
tion demand to alternatives to single occu- tion to reducing congestion in the long-run.
C O N T E N T S pancy vehicle (SOV) use, shifting travel Moreover, new infrastructure takes a long
Chapter 1 Background, 1 out of the peak period, or shifting it to less time to plan and implement, and it is often
Chapter 2 Summary of Research crowded facilities. disruptive to communities.
Findings, 2
While we are accustomed to seeing local Managing travel demand offers the po-
Survey Results, 2
Case Studies, 2 and regional jurisdictions actively promote tential to improve the efficiency of our trans-
Chapter 3 Primer, 5 TDM strategies, current and emerging chal- portation system in ways that more rapidly
What Is Transportation Demand
lenges facing the transportation system are and cost-effectively address traffic conges-
Management (TDM)?, 5
Why Should State DOTs Be putting more emphasis on the value of tion issues. In addition, TDM strategies
Interested in TDM?, 5
What Are the Potential Roles of statewide efforts focused on TDM. Traffic offer the potential to address non-recurring
State DOTs in TDM?, 6 congestion continues to challenge urban events, such as weather conditions (e.g.,
How Can State DOTs Organize
Efforts to Advance TDM?, 9 areas of all sizes across the country. Accord- snow, ice, or rain); work zones; special
What Are Some Implementation
Steps or Tips for State DOTs?, 11 ing to the Texas Transportation Institute's events; and major incidents and emergen-
Chapter 4 Survey Results, 13
Urban Mobility Study, congestion has in- cies, which are estimated by Federal High-
Survey Responses, 14 creased in urban areas of all sizes over the way Administration (FHWA) to be respon-
Chapter 5 Case Studies, 15 past 20 years, and with more roads expe- sible for over one-half of all traveler delay.2
Massachusetts Department of
Transportation (MassDOT), 15
riencing congestion over more hours of The objective of this research task was
New Jersey Department of the day.1 Limited transportation funding is to examine TDM programs nationwide to
Transportation (NJDOT), 21
Georgia Department of
Transportation (GDOT), 26
Utah Department of Transportation 1Texas Transportation Institute., Urban Mobility 2 Federal Highway Administration, Traffic Conges-
(UDOT), 36
California Department of Report 2009, press release. http://mobility.tamu.edu/ tion and Reliability: Trends and Advanced Strategies
Transportation (Caltrans), 43 ums/media_information/press_release.stm, accessed for Congestion Mitigation. http://ops.fhwa.dot.gov/
Appendices A and B, 49 12/9/2009. congestion_report/chapter2.htm, accessed 12/7/2009.
