For the overlay module of PAVEXpress under development, the user will be able to specify a mill/grind depth for the existing pavement. The amount of material removed will be used to adjust the in-place structural number. This adjusted structural number will be used with the required structural number for the overlaid pavement to determine an overlay thickness. PAVEXpress will provide guidance is determining mill depth and procedures to adjust the existing structural number if cracks exist and the pavement will not be milled.