A Kinetic-Style Framework for Urban Traffic Flow and Infrastructure Quality Integration Using a Standardized Grade Point Average (sGPA) System

Abstract

Paul T E Cusack

This paper proposes a unified analytical framework linking traffic flow theory and pavement condition assessment through a standardized Grade Point Average (sGPA) system. A kinetic-style formulation is introduced in which traffic flow energy is expressed as a function of density and velocity, analogous to classical kinetic energy. The model integrates this formulation with a pavement condition transformation based on the ASTM D6433 Pavement Condition Index (PCI), mapped onto a 4.3-scale grading system. The resulting framework enables combined analysis of infrastructure quality and mobility efficiency within a unified scalar structure. Applications are discussed for urban systems such as Saint John, where heterogeneous infrastructure conditions significantly influence network performance.

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