Results

(since width restrictions make things unreadable and messing with the HTML to allow for a wider content frame is too much work, here's a link to a full sized version)
This map shows ten polygons that fall outside of the services buffer. Of those, eight had some sort of state highway running through them, four bordered state lines, four contained less than one mile of roadway, and one was located at a major highway junction (Farson Jct, Wyoming Highway 28 and US Route 191). Yellowstone National Park presents an interesting anomaly as it has services and almost all traffic headed on US-14/16/20 west of Cody and on US-89/191/287 north of Moran Jct could be considered to be heading to Yellowstone National Park, so although it is not within range of official cities or rest areas, it could be considered to provide services, so the northwestern most polygon could be mostly discarded.


(again, link to full sized version)


These highways were all located outside of the rest area buffer. To determine corridor, the major cities at either highway’s termini were looked at, or the most logical major city along its route or a neighboring route. A highway corridor was deemed major if it was the most logical connection between population areas of more than 1000 or is a highway of national significance. Despite US-14/US-16 between Sheridan and Gillette being designated as a U.S. Numbered Route, it is assumed most travelers will take neighboring Interstate 90 as the distance is about the same and that road is built up to freeway standards, so US-14/US-16 along that stretch is no longer of national significance. Assuming we want roads with large amounts of fatalities, in this case determined to be anything more than 10, then we find four good spots for rest areas that are on major roads, not within 30 miles of services, and with high fatality rates. Those are shown in the above map.