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This paper applies panel data approach to estimate the price elasticity of demand for toll road usage in the US.Since passengers and trucking companies have different ability and willingness to pay to use toll road,this paper applies the fixed-effect and random-effect models to estimate their price elasticity of demand for toll road usage separately.The regression results indicate that the price elasticity of demand by passengers is-0.29 while the price elasticity by trucking companies is-0.45.The regression results also indicate that although toll usage is negatively impacted by higher fuel prices,toll usage by passengers is more sensitive compared to than that of trucking companies.