This pie chart displays vehicle types and their registration counts, with proportional slices labeled in thousands and a corresponding color-coded legend. It loads CSV data from a GitHub gist, calculates the pie layout using `d3.pie`, and renders SVG paths with `d3.arc`. The visualization uses `d3.scaleOrdinal` for slice colors, formats values with `d3.format`, and appends legend rectangles and text labels. The chart is centered in an SVG and includes a title, with values shown numerically inside each segment.