It's easy to find the geometric halfway point between two points. It's only slightly more effort to find the line representing equidistant points between the two.
What I'd like is something that can give at least the ideal point, and preferably a few alternates from the second category, accounting for roads on a map.
I have a few friends who have moved away, and we occasionally meet up when they're back in certain areas, but it would be handy to look at what our actual driving halfway point along the shortest/fastest route would be. It seems like this would be fairly easy for someone with a good routing program and understanding of how it works.
For example, me in Stephenville TX, and a friend near Joplin MO. The fastest route is pretty much 281 to OKC, then I44 though Tulsa, and on to Joplin. A bit over 7 hours one way, so no good way to day trip it both ways and still be able to do something there, but each going 3.5 hours, hanging out for a few hours, then driving home is doable. The halfway point is right about the middle of BFE, so meeting there is likely to be pretty boring. A few adjustments (well within the ability of Waze on a smartphone, which usually offers 3 route choices) moves one possible halfway point somewhere between McAlester and Muskogee. Still not ideal, but there are more places there where we could at least get dinner and hang out for a few hours at a park or tourist attraction.
Has anybody found something like this? If not, what would be the best framework to start with? ISTM that with several nav sites offering multiple route options to be chosen among, showing the halfway point of each would be a simple addition.