This pie chart visualizes vehicle registration counts by type, with each slice labeled with its abbreviated value (e.g., "15K) and accompanied by a color-coded legend showing both the category name and exact count. The chart loads CSV data from a GitHub gist using `d3.csv`, then constructs the pie with `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` for color mapping, while text labels are positioned via `arc.centroid`. Rendered as SVG, the visualization uses D3 v5 selection methods to append paths and legend elements.