This research involved a study of the feasibility of using the patterns of work trips alone to represent the patterns of travel for all purposes in an \«?bat area. Further, the feasibility of usin^peak hour travel patterns to represent those of the entire day v&s investigatedThe objective was to develop an approach to travel surveys which would satisfactorily reproduce the r-esults of a conventional home interview survey, Using data from a X96fc comprehensive transportation survey in Indianapolis, Indiana, an analysis of variance was run to determine the effect of the ccaBsnonly defined factors, mode, purpose, a ad time, on trip volume and average trip length. Based onfcbaexteeajaly !sigb signify icance of all main effects awl interactions , a second variance analysis was sun to determine the effect of more specific purpose, time and mode factors on the traffic assigned to th3 freeway and arterial, links of the highway system* The significance of all main effects a^id a mode-purpose interaction were the baais for regression models account gag for mode, the peak hour, and the work purpose, A high decree of the variation in total trips on all major street system links was eaqplaiaed by multiple HfM?ar regression equations baaed on link volumes for the work purpose .Using the same regression approach, high degrees of explanation were achieved for total day, all purpose trips usicg all peak hour trips and for all peak hour trips using total day work trips. 7EHB JOSIRNEY TO fcORK; A SINGULAR BASIS FOR PATTERN SURVEYS

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