Think about spinning a weight on the end of a string. When you are turning a corner, this acceleration is 90 degrees from the direction you are traveling, regardless of how tight a turn you are making. Any time you change velocity you are undergoing an acceleration. Harsh cornering is a little trickier to both calculate and grasp intuitively. To get a better understanding of linear acceleration and g-forces, check out this handy Acceleration Calculator. The braking rule is even more lenient and would require that you come to a complete stop from 60 km/h in 2.78 seconds, de ccelerating at 0.61 Gs. The least sensitive setting in the default rule for acceleration is 0.43 Gs which is what a driver (or Geotab GO device) would experience if you accelerated from standstill to 60 km/h in 3.95 seconds. The harsh acceleration and harsh braking rules are really the same thing and measure how quickly you are speeding up or slowing down. If we look at the three harsh driving rules, we can do some simple calculations to find out how fast a driver would need to take a corner or accelerate from a stop sign to break these rules. On the other hand, for a box truck carrying paper towels, a lower sensitivity might be sufficient. Similarly, to closely monitor an ambulance carrying an EMT and patients in the back, you would increase the sensitivity. For example, if you are seeing too many harsh driving events and you want to manage that, you might select a more sensitive setting. We recommend starting in the middle of the specific vehicle class and adjusting from there based on your fleet objectives and the unique aspects of your fleet. Recommendations for setting up driver feedback A sports car can safely take a corner faster than a truck.įor a table of the average g-force exertions for various vehicle classes, see the Geotab Product Guide. In the harsh driving rules, we specify the vehicle size (passenger car, truck/cube van, and heavy-duty truck) as a suggestion. It’s also important to mention that since this is an acceleration and not a force, the vehicle’s mass or size doesn’t matter at all. Moving the slider to the right increases the sensitivity of monitoring.Īccelerometer Driver Feedback Settings set to Least sensitive (Passenger Car.)Īccelerometer Driver Feedback Settings set to Most sensitive (Heavy-Duty.) 0.61 G) is less sensitive, meaning that only the most aggressive driving events will break the rule, triggering driver feedback. 0.47 G) is more sensitive and means the rule is easier to break. When setting up harsh driving rules in MyGeotab, adjusting the level of sensitivity will affect when feedback is given for a harsh driving event - either a beep or a spoken alert if you have GO TALK installed. You can access the settings from Vehicle Edit > Driver Feedback tab. See also: What is a connected car How g-force relates to harsh drivingĪs mentioned, you can configure the Geotab telematics Device to produce immediate audible feedback in response to excessive driving behaviors such as harsh acceleration, harsh braking, and harsh cornering. Since this is just a different scale for measuring acceleration, it not only applies to gravity, but can be used to quantify any acceleration. On Earth, the acceleration of gravity generally has a value of 9.806 m/s2 or 32.1740 f/s2. Gravity is measured in metres per second squared, or m/s2. It’s what keeps our feet firmly planted on the ground. 1G is the acceleration we feel due to the force of gravity. G-force and accelerationīefore we get to the software, let’s talk about g-force. In fleet management software like MyGeotab, harsh driving - when accelerating, cornering or braking, for example - is defined in terms of g-force. A question we get asked frequently is: “How do g-force values relate to real world driving habits?”
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