Under a proposed perception-evaluation-response framework, a model structure with the notion of "satisficing" rule is constructed in this study to investigate the drivers' dynamic en-route route choice/switch behaviour under the provision of the in-vehicle routing information by Dynamic Route Guidance System (DRGS). The satisficing rule is formulated by specifying the model with the notion of indifference bands of tolerable threshold, where time-dependent variation of indifference bands are captured in the model specification as systematic component plus an error term. This model considers each driver's node-to-node routing decisions are in fact a series of actions regarding switches from referenced route choices such as recommended routing advices from the in-vehicle DRGS. Data used to calibrate the model was obtained by using a laboratory simulator, which mimics the basic functions of most DRGS. Sixty selected commuters between Taipei City and its satellite community Tamsui participating this simulation experiment provided their consecutive en-route routing record as model input.
Abstract