Transport risk models for hazardous materials: revisited

We study several functions that have been proposed for comparing transport routes for a hazardous materials shipment. We show that many proposed path evaluation functions are based on an approximation. While these functions can be modified to avoid the approximation, these more accurate versions violate two reasonable axioms. We propose a new family of models by redefining the decision problem as one of satisfying demand for a hazardous material at the destination point. The new models satisfy the axioms. Acknowledgment: This research has been supported in part by grants from the Natural Sciences and Engineering Council of Canada (RGPIN 25481 and RGPIN 203534).