The purpose of this chapter is to provide an overview of the tools, data requirements, input parameters, and MOEs for three levels of segment analysis: Sketch-level or macroscopic, HCM-based (mesoscopic), and Microsimulation (microscopic). Each tool corresponds to a different level of precision and accuracy. This chapter is intended to be used as a resource and informational guide for practitioners and covers the latest methodologies, practices, and procedures for analyzing segments. This chapter generally follows the HCM but also recommends different tools and methodologies where limitations exist.