This map of New York City boroughs uses distinct colors for each borough, with semi-transparent circles and white text labels displaying the number of motor vehicle crashes per borough. The visualization loads TopoJSON geographical data and CSV crash statistics, then renders them as an SVG using React, D3’s `geoMercator` and `geoPath` projections, and `topojson-client`’s `feature` conversion. Circle radius is determined by the digit count of crash totals, providing a quick comparison of crash frequency across the five boroughs.