This bar chart visualizes parking rates across different area managers by comparing the calculated fare per step size. The chart uses a horizontal layout with rectangles scaled proportionally to the rate values, while country names are displayed on the y-axis. Data is fetched from two RDW API endpoints and combined asynchronously. The visualization is built with D3 v6, using `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to render the SVG elements.