This study was undertaken to measure and assess current transportation behavior, attitudes, and adjustments people have made or are planning to make to cope with higher costs of transportation and energy shortages. A secondary objective was to develop an effective and inexpensive system to collect a sizable amount of multi-modal data for various types of travel from a statistically reliable sample of households in the state of Washington. Telephone interviews of approximately 15 minutes in length were conducted with 2,500 households in 1980 and 2,000 homes in 1983, with both samples having a 95 percent confidence level. Residents of metropolitan, urban and rural areas were included. The households interviewed were selected by a random computer search of telephone numbers. Respondents were screened to ensure that an adult member (18 years or older) of the household was interviewed. The questionnaire dealt with the travel habits of the household rather than just the person being interviewed. Travel to work, local travel, long distance travel, recreational travel, use of the public transit and other modes of travel, as well as vehicle ownership trends were topics covered in the interviews. The household's travel patterns two years prior to the interview, as well as current behavior and future plans were included. The replies to the questions indicated that people were concerned about transportation problems and were willing to provide detailed facts and opinions about their household's transportation behavior.