This animated scatter plot visualizes traffic accident data, plotting speed limits against the number of vehicles involved, with points color-coded by weather condition and shaped by accident severity. The visualization cycles through different x-axis variables every three seconds, alternating between speed limit and driver experience. Built with D3.js v6, the example uses `scaleLinear` for axes, `scaleOrdinal` for categorical color and shape encoding, and `symbol()` for point markers. Data comes from a CSV file fetched via `csv()`, rendered as an SVG with axis labels, legend, and custom styling.