Visualizing EMS Service Delivery Options

I put together a neat little visualization that allows the user to do a back-of-the-envelope calculation of what an EMS service delivery option.  You can try it out at  It is a shiny app.  Because of the time crunch it is slow because it is doing a lot of calculations on the fly.  If I were to do it again I would have preprocessed the data and saved the results.  It would cut out the costly computations.  But in any event it is a really neat tool.