It may be desirable to estimate only a single OD matrix from a multiple user class Avenue assignment. This could occur such as in a case where the user may wish to use different input parameters for each class, or may only be concerned with a single class at the moment. In this case, the DYNCLASS parameter can be used to define the class the user wishes to estimate. When using DYNCLASS, you must provide the Analyst Drive program with a single dynamic count file, a single OD matrix for the desired class, and the Avenue packet log file. The DYNCLASS parameter should then be set to the corresponding class number as defined by the Avenue assignment.