This bar chart shows the range of different electric vehicles in miles, comparing current range to a new extended range with GTC technology. Two overlaid bars per vehicle display both values, with color-coded legends and numeric labels. The visualization uses D3 v5 with `scaleLinear` and `scaleBand` for positioning, `axisLeft` and `axisBottom` for axes, and `csv` to load data from a GitHub gist. SVG is used for rendering, with bars, labels, and a legend drawn directly in the markup.