Figure 3
A 3D scatter plot with a surface plot overlay. The x-axis represents the share of transit trains in percentage, ranging from 0 to 100. The y-axis represents the length of the railway in kilometers, ranging from 0 to 50. The z-axis represents the speed in kilometers per hour, ranging from 0 to 60. The scatter plot contains hundreds of data points, which are color-coded in green. The surface plot is color-coded in a gradient from purple to yellow. The surface plot represents the response surface of the KAN formula trained on two features: average speed as a function of block-section length and share of transit trains. The data points show a positive correlation between the share of transit trains, the length of the railway, and the speed. All values are approximated.Response surface of the KAN formula trained on two features: average speed as a function of block-section length (x2) and share of transit trains (x1)