This time the mine cart is heavy enough and Rufus can use switches to create the proper route. Your task is to get to the bottom right corner of the map (you start in top left corner) (#1). Levers change track transmission in a given color and Switches change the color of points P1 and P2 (once you drive over them, the track transmissions in the same color are switched) (#2).
One of the correct solutions is shown on the above screen (yellow and green lever down, red lever up, left switch on green, right switch on red). If everything is set correctly, Rufus will confirm it with proper sentence: Now we're really going places! You can set off.
Watch the funny cut-scene after which Rufus and Goal will reach Lower Ascension Station.