This pie chart displays the distribution of vehicle transmission types from a 2000 model year dataset, with slices colored via a categorical scale. The chart uses d3.pie to compute arc segments and d3.arc to render them as SVG paths, with an animated tooltip appearing on mouseover to show each transmission type and its count. Data is loaded from a CSV file using d3.csv, aggregated with d3.rollup, and presented alongside a legend built from the same data. The visualization employs a static SVG canvas with interactive hover effects.