Determining the distance between locations for which we want to calculate travel times should be an early decision. Take terrain changes between each pair of locations into account. Then decide which travel methods will be used in your books; there’s no sense in calculating dragons’ travel time if they don’t exist in your world. Review the base miles per day that this book provides and alter them to suit your judgment. Do the same for terrain and other modifiers. Now you’re ready to calculate the travel times. The easiest method is to use the pre-set ones provided. Otherwise, carefully study the equations in this chapter and the Excel spreadsheet and apply them as needed.