Potential locations of new safety rest areas in the state of Wyoming

For my project, I am interested in analyzing what highway corridors in the state of Wyoming need rest areas. While Wyoming is generally fairly good at rest area placement, there are some corridors that seem to be lacking, without having done any research. As Wyoming is one the largest and most desolate states in the country, the presence of frequent rest areas is crucial within the state to prevent driver fatigue and enhance highway safety.
I will create a rest area layer for the state simply by plotting the points of rest area corresponding to where they appear. I will use the official state highway map as a reference and plot the points over where the rest areas are in corresponding satellite imagery. This will indicate where existing rest areas are, which is crucial to knowing where they need to go. I will assign these rest areas by what county they are in. I am still in the process of creating these data.
From the Wyoming DOT, I will obtain a major roads layer and an accident layer by road. I will additionally use a layer that indicates where major settlements are, as these generally have convenience stores and other places to rest. Should I be unable to obtain an accident layer, I will use a vehicle accidents layer from the University of Wyoming Department of Geography to determine what counties most frequently experience automobile accidents.
Essentially, I plan on using my created rest area and major settlement layers and uniting them into one layer of places where it is possible to rest. I will attribute query to use only settlements of population of more than 1000, as towns smaller than this frequently don’t have services. I will find some non-spatial data from independent agencies that determines how frequently rest areas should exist or drivers would be well suited to stop, and I will generate a buffer of that radius around these areas. From that, I should have some gaps along major highways. I will then intersect the accidents layer with the road layer to determine where accidents are most prevalent along the roads. At that point, I should hopefully see some areas where accidents are high that are not within a good radius of a rest area. It should then appear clear where rest areas within the state are lacking.