The papers in this volume present a variety of innovative techniques to monitor, collect, and disseminate travel survey information. Several papers focus on techniques of collecting travel information, such as travel diaries, origin-destination surveys of households, and expansion weighting procedures to generate population estimates, factoring procedures to eliminate nonresponse bias, a two-staged household survey mail-back questionnaire, and an analysis of underreporting of tris in telephone interviews. Also in this Record are papers reporting the results of video and computer applications. Video imaging technology to collect flow rate data is described; the effective use of video when roadside interviews are not possible is discussed; and the practice of image processing for the segmentation and matching of vehicles in road images is explained. Computer applications include a survey system that uses a touch-screen interface to elicit data on user satisfaction and a data acquisition system that employs tape switch sensors on the roadway. The overall effectiveness of entering information from a telephone interview survey directly into a computer file is also studied.
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