Motorcycle rally racing is a high-speed, exciting, off-road motorsport that involves zipping across all types of terrain on two wheels. While riding, it’s extremely important for riders to know what’s coming up next — turns, straightaways, stream crossings, the list goes on. Generally, this is handled by a roadbook — a paper scroll that has diagrams of each turn or course checkpoint, along with the distances between them and any other pertinent information. Of course, this needs to be paired with a readout that tells you how far you’ve travelled since the last waypoint so you’re not just guessing. This readout usually takes the form of a rally computer, a device that can display speed, distance travelled, and course heading (and some of the fancier ones have even more data available).
See https://hackaday.com/2021/11/11/motorcycle-rally-computer-goes-open-source/
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