This example presents a dark-themed interactive map of New York City motor vehicle crash locations, visualized as a point dataset over a base map. The view centers on the city and uses an initial zoom level of 10, with a full-screen map container. The visualization relies on the Mapbox GL JS API (v0.43.0) to render the base map and manage user interaction. It loads crash data from a remote GeoJSON file and also references a second JSON file containing hexbin aggregates, although the code shown only initializes the map and sets the access token. The map is configured with the "dark-v9" style, and D3 v4 is included in the page.