Abstract
We proposed two hypotheses with respect to the process of adjusting anticipated travel time to a new traffic environment: the Information-Effect Hypothesis, i. e. as a driver acquires more information on travel time, he can predict travel time more precisely and refers less to anticipated travel times he has had in the past in order to anticipate travel times; and the Experience Dominance Hypothesis, i. e. the influences on anticipated travel time of information which is not from driving experience is weaker with actual driving experience than without actual experience. These hypotheses were supported by statistical tests applied to data of commuting drivers' anticipated travel times during a closure of Flanshin-Expressway route. The result has an implication that formulating an effective information-dissemination policy requires a marketing strategy that accounts for whether drivers have actual experiences or recognition that they have experiences.
