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 https://msilva-cgr.shinyapps.io/essex-county-ems-options/. 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.