The red line shows the average speed in the range of 0-40 km / hour yellow line. During the show, when the average speed is 40-70 km / hr. When the green. During the show, when the average speed is 70 km / h or more. Etc.
The red line, show when the average speed in the range of 0 - 40 km / h yellow line. Show when average speed in the range of 40 - 70 km / h the green line. Show when average speed in the range of 70 km / h up etc.