This interactive tree map displays a hierarchical classification of different vehicle types, from the root "VEHICLE" down to specific models like the Lamborghini Diablo and Ferrari Testarossa. The static dataset builds a two-level branching structure separating two-wheelers from four-wheelers, with each node color-coded by its fill property. Rendered as an animated SVG using D3.js version 3.5.17, the visualization employs the `d3.layout.tree()` and `d3.svg.diagonal()` APIs to position nodes and draw connecting links, while node transitions are handled through the `.transition().duration()` method.