This radial bar chart shows the distribution of values for 100 kilometers, with two series overlaid to compare data from the left and right lanes. The chart uses a circular layout where each segment represents a kilometer, and the two bars for each category are drawn as arcs at different radii. The visualization is built with the d3.js v4 library, using `d3.scaleBand` for the angular axis and `d3.scaleRadial` for the radial values. The chart is rendered as an SVG, loading data from a CSV file.