Modern cars surround drivers with digital certainty, yet one of the most basic numbers on the dashboard is quietly biased in your favor. The speedometer is designed to err on the side of reading high, ...

Let's imagine that you are in a car with no windows. I know that's crazy, but just hold on. Although there are no windows, you can see the speedometer. So here is the question. Is it possible to ...

If you've ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you've immediately screwed up your speedometer. This is, of course, annoying, but for modern cars ...

If you drive your hot rod, even once in a while, then you depend on all of your gauges to be reliable and accurate. Just a small percentage of miscalibration can result in engine damage or failure, ...

Smartphones can do so many things. Gauging your speed is one of those things. You may need a speedometer app for many reasons. Runners can use them to gauge their speed. Car enthusiasts can use them ...

Knowing your driving speed is extremely important for long drives, a trip to the local market, or just a short weekend getaway. Vehicles have various safety features loaded into them, but one of the ...