This pie chart visualizes vehicle registration counts by type, with each slice labeled with its value in thousands and accompanied by a color-coded legend. The visualization uses D3 v5’s `d3.pie` and `d3.arc` to generate the chart, `d3.scaleOrdinal` for slice colors, and `d3.format` for tick labels. Data is loaded asynchronously from a CSV file via `d3.csv`, and the chart is rendered as SVG with custom styling for text and legends.