This interactive bar chart visualizes the number of Park and Ride (P+R) parking spaces across Randstad cities, with data fetched from a GitHub-hosted JSON file. A checkbox toggles between individual city entries and combined capacities for double-listed cities, updating the visualization. Built with D3 v6, the chart uses `scaleBand` and `scaleLinear` for axes, and `axisBottom`/`axisLeft` for ticks. Bars animate from zero height to their final values via `.transition().duration()`, and the x-axis labels rotate 50 degrees for readability.