On the Calibration of the Gravity Model

Abstract

Knowledge of Origin-Destination (OD) trip matrices is needed in many stages of trans-<lb>port planning. As direct observations of OD-flows are usually not available, a com-<lb>monly used approach is to estimate them from traffic counts and other aggregated flow<lb>constraints. The under-specification that characterizes this estimation process can be<lb… (More)

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