This interactive bar chart visualizes the number of P+R parking spaces across Randstad cities, with each bar representing a city’s total capacity. A checkbox aggregates parking data for cities with multiple locations, updating the chart through dynamic transitions. Built with D3 v6, it uses `scaleBand` and `scaleLinear` for axes, employs SVG rectangles with animated height transitions, and loads data from a remote Gist endpoint. The visualization supports smooth updates via enter, update, and exit selections.