Turboslavc
That is how much time you save per kilometre by speeding at 150 km/h instead of 130 km/h.
Have you noticed that when you are running late and speeding, you still arrive only slightly sooner than if you drove within the limit? Turboslavc explains why. It measures speed in time per kilometre instead of the usual kilometres per hour. It supports HUD mode for projecting the display onto the windscreen.