This interactive bar chart shows the number of P+R parking spaces across cities in the Randstad region of the Netherlands. A checkbox toggles between individual parking locations and combined city totals, with bars animating between states using D3 transitions. The visualization uses d3.scaleBand and d3.scaleLinear for axes, with data fetched from a GitHub-hosted JSON file and processed through custom cleaning and transformation functions. SVG rendering includes animated height transitions for entering, updating, and exiting bars.