There are three SMOKE programs to handle mobile emissions processing, Mbsetup, Premobl and Emisfac. The Mbsetup program groups the reference counties, handles the set up of the user-defined spatial and temporal averaging approach for the meteorology data, assigns the speed profiles to the sources and creates the speed summary file. The Premobl program spatially and temporally aggregates the temperature, humidity and pressure data from the meteorology files for input into Emisfac. The Emisfac program runs the MOBILE6 model to create emission factor files for all mobile sources.