ABSTRACT Commuter travel has certain features that make it potentially more responsive to interventions than other types of travel. However, from the perspective of the employer attempting to implement a trip reduction program, it is often difficult to determine what type of intervention (or combination of interventions) would be most effective. This article reviews the literature on strategies for changing commuter behavior, with a focus on techniques that an employer might use (i.e., rather than a focus on physical or regulatory barriers to non-conserving behavior). Behavior change strategies are organized into three categories: informational approaches, positive motivational approaches, and coercive approaches. In general, research in commuter behavior change
has focused on the application of external, tangible motivation (e.g., financial incentives or disincentives) to the exclusion of self-initiated, less tangible factors (e.g., commitment and self-monitoring techniques). The implications of this bias are discussed along with suggestions for future research.