Milestones Milestones I call them Milestone Charts, after their reliance on highway milemarkers. Now they have grown to include most fast food restaurants, three brands of gasoline, KOA, and some extras. Besides I-85, I have tried to document every major route that I've travelled. I've been using Microsoft Excel to keep track of the information, starting with version 2.2 and moving up as my access at Clemson upgraded. I've not made up an official legend, so here's an explanation.
Transition indicates when a switch to another highway is made, as read down the list.
It's possible to read up the list by looking at the description of the first exit following a transition. In states such as GA and FL, both exit number and milemarker are necessary to convey the information of how far along the highway the exit is. In these states, exit numbers aren't based on milemarkers. Description includes exit information such as road names, nearby cities, and following a semi-colon, services that are not in the checklist. Rest for rest areas, indicates the highway direction of the side on which there is a stop.