Microsimulation is the modeling and analysis of transportation networks and is used to assess the performance of highway and street systems, transit, and multi-modal facilities. These models analyze existing and future conditions and are useful in developing transportation solutions. To create a realistic and dependable model with reliable results, modelers are recommended to properly scope the project, choose the appropriate analysis tool, replicate existing conditions as accurately as possible, complete the analysis, and effectively summarize and document the results.

Microsimulation models are typically complex and demand experience and careful attention to detail to confirm accurate outputs. Because models are largely built on modeler-defined inputs and assumptions, it is recommended that modelers carefully analyze and report results. In addition to requiring strong modeling judgement, model development, debugging, and calibration are also resource-intensive processes. These processes are potentially more resource-intensive than other forms of analysis and it is recommended that care be given when deciding whether microsimulation is the correct method to analyze the project.