MOVES (MOtor Vehicle Emissions Simulator) is a computer program designed by the US Environmental Protection Agency (EPA) to estimate air pollution emissions from mobile sources. MOVES2010 (hereafter referred to as MOVES) replaces EPA's previous emissions model for on-road mobile sources, MOBILE6.2. MOVES can be used to estimate exhaust and evaporative emissions as well as brake and tire wear emissions from all types of on-road vehicles. MOVES is designed to allow users to analyze motor vehicle emissions at multiple scales, from national to county level to project level, using different levels of input data. This document provides guidance on the use of MOVES for inventory development in State Implementation Plans (SIPs) and for regional emissions analysis for transportation conformity determinations. The process for generating on-road motor vehicle emissions estimates for conformity purposes is commonly referred to as a regional emissions analysis in conformity documents. However this term could be confused with the process of creating an inventory for a SIP.