TRANSPORTATION DEMAND MANAGEMENT - PLANNING, DEVELOPMENT, AND IMPLEMENTATION

Transportation demand management (TDM) is the art of modifying travel behavior, usually to avoid more costly expansion of the transportation system. TDM is not a panacea, but it can help ease some transportation problems. TDM requires the cooperation of many actors, who may include developers; landowners; employers; business associations; and municipal, county, regional, and state levels of government. This article reviews new TDM organizational forms, including transportation management associations, trip reduction ordinances, and negotiated public-private agreements. More flexible approaches appear to work best. TDM evaluation is difficult, because reductions in trip generation rates, i.e., relative changes in travel demand, are not easy to measure. Evidence suggests that TDM can be applied in a wide variety of situations, with equally variable, and sometimes quite good, overall results. TDM strategies that often have proven to be effective include on-site employee transportation coordination, parking management provisions, and alternative work schedules. © Taylor & Francis Group, LLC.