The desire to link travel demand models and traffic simulation models has been recognized by transportation agencies and professionals.With the advent of computing technologies, transportation agencies are increasingly adopting microscopic traffic simulation models for large-scale design projects to obtain more detailed operational analyses. Traditionally, there has been a disconnection between the macroscopic and microscopic levels. Traffic simulation tools are often used to account for the movements of individual vehicles at a microscopic level.
Travel demand forecasting models have typically been used for planning purposes for future transportation systems at a macroscopic level. Travel demand forecasting and traffic simulation are two important components of transportation studies.
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